99157969 has 2 divisors, whose sum is σ = 99157970. Its totient is φ = 99157968.

The previous prime is 99157963. The next prime is 99157987. The reversal of 99157969 is 96975199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61027344 + 38130625 = 7812^2 + 6175^2 .

It is a cyclic number.

It is not a de Polignac number, because 99157969 - 2¹⁷ = 99026897 is a prime.

It is a super-2 number, since 2×99157969² = 19664605632409922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99157963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49578984 + 49578985.

It is an arithmetic number, because the mean of its divisors is an integer number (49578985).

Almost surely, 2^99157969 is an apocalyptic number.

It is an amenable number.

99157969 is a deficient number, since it is larger than the sum of its proper divisors (1).

99157969 is an equidigital number, since it uses as much as digits as its factorization.

99157969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 55.

The square root of 99157969 is about 9957.8094478655. The cubic root of 99157969 is about 462.8524223060.

The spelling of 99157969 in words is "ninety-nine million, one hundred fifty-seven thousand, nine hundred sixty-nine".