999100901 has 2 divisors, whose sum is σ = 999100902. Its totient is φ = 999100900.

The previous prime is 999100889. The next prime is 999100909. The reversal of 999100901 is 109001999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813732676 + 185368225 = 28526^2 + 13615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999100901 is a prime.

It is a super-2 number, since 2×999100901² = 1996405220758023602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999100909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499550450 + 499550451.

It is an arithmetic number, because the mean of its divisors is an integer number (499550451).

Almost surely, 2^999100901 is an apocalyptic number.

It is an amenable number.

999100901 is a deficient number, since it is larger than the sum of its proper divisors (1).

999100901 is an equidigital number, since it uses as much as digits as its factorization.

999100901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 999100901 is about 31608.5574014380. The cubic root of 999100901 is about 999.7002104686.

It can be divided in two parts, 999100 and 901, that added together give a palindrome (1000001).

The spelling of 999100901 in words is "nine hundred ninety-nine million, one hundred thousand, nine hundred one".