99011879957 has 2 divisors, whose sum is σ = 99011879958. Its totient is φ = 99011879956.

The previous prime is 99011879917. The next prime is 99011880017. The reversal of 99011879957 is 75997811099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94061209636 + 4950670321 = 306694^2 + 70361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99011879957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99011879893 and 99011879902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99011879917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49505939978 + 49505939979.

It is an arithmetic number, because the mean of its divisors is an integer number (49505939979).

Almost surely, 2^99011879957 is an apocalyptic number.

It is an amenable number.

99011879957 is a deficient number, since it is larger than the sum of its proper divisors (1).

99011879957 is an equidigital number, since it uses as much as digits as its factorization.

99011879957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12859560, while the sum is 65.

The spelling of 99011879957 in words is "ninety-nine billion, eleven million, eight hundred seventy-nine thousand, nine hundred fifty-seven".