999992101 has 2 divisors, whose sum is σ = 999992102. Its totient is φ = 999992100.

The previous prime is 999992099. The next prime is 999992107. The reversal of 999992101 is 101299999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998623201 + 1368900 = 31601^2 + 1170^2 .

It is an emirp because it is prime and its reverse (101299999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999992101 - 2¹ = 999992099 is a prime.

Together with 999992099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999992107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499996050 + 499996051.

It is an arithmetic number, because the mean of its divisors is an integer number (499996051).

Almost surely, 2^999992101 is an apocalyptic number.

It is an amenable number.

999992101 is a deficient number, since it is larger than the sum of its proper divisors (1).

999992101 is an equidigital number, since it uses as much as digits as its factorization.

999992101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 49.

The square root of 999992101 is about 31622.6517072810. The cubic root of 999992101 is about 999.9973669931.

The spelling of 999992101 in words is "nine hundred ninety-nine million, nine hundred ninety-two thousand, one hundred one".