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999099901 is a prime number
BaseRepresentation
bin111011100011010…
…000110111111101
32120121222112102001
4323203100313331
54021232144101
6243050102301
733521131462
oct7343206775
92517875361
10999099901
11472a695a8
1223a71a991
1312bcb3597
1496995669
155caa4901
hex3b8d0dfd

999099901 has 2 divisors, whose sum is σ = 999099902. Its totient is φ = 999099900.

The previous prime is 999099887. The next prime is 999099919. The reversal of 999099901 is 109990999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 600299001 + 398800900 = 24501^2 + 19970^2 .

It is a cyclic number.

It is not a de Polignac number, because 999099901 - 25 = 999099869 is a prime.

It is a super-2 number, since 2×9990999012 = 1996401224356419602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999099991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499549950 + 499549951.

It is an arithmetic number, because the mean of its divisors is an integer number (499549951).

Almost surely, 2999099901 is an apocalyptic number.

It is an amenable number.

999099901 is a deficient number, since it is larger than the sum of its proper divisors (1).

999099901 is an equidigital number, since it uses as much as digits as its factorization.

999099901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 531441, while the sum is 55.

The square root of 999099901 is about 31608.5415829329. The cubic root of 999099901 is about 999.6998769352.

It can be divided in two parts, 999099 and 901, that added together give a 6-th power (1000000 = 106).

The spelling of 999099901 in words is "nine hundred ninety-nine million, ninety-nine thousand, nine hundred one".