99932785957 has 2 divisors, whose sum is σ = 99932785958. Its totient is φ = 99932785956.

The previous prime is 99932785937. The next prime is 99932785991. The reversal of 99932785957 is 75958723999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78372562401 + 21560223556 = 279951^2 + 146834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99932785957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99932785957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99932785937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49966392978 + 49966392979.

It is an arithmetic number, because the mean of its divisors is an integer number (49966392979).

Almost surely, 2^99932785957 is an apocalyptic number.

It is an amenable number.

99932785957 is a deficient number, since it is larger than the sum of its proper divisors (1).

99932785957 is an equidigital number, since it uses as much as digits as its factorization.

99932785957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 385786800, while the sum is 73.

The spelling of 99932785957 in words is "ninety-nine billion, nine hundred thirty-two million, seven hundred eighty-five thousand, nine hundred fifty-seven".