99158897 has 2 divisors, whose sum is σ = 99158898. Its totient is φ = 99158896.

The previous prime is 99158867. The next prime is 99158971. The reversal of 99158897 is 79885199.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61716736 + 37442161 = 7856^2 + 6119^2 .

It is a cyclic number.

It is not a de Polignac number, because 99158897 - 2⁶ = 99158833 is a prime.

It is not a weakly prime, because it can be changed into another prime (99158827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49579448 + 49579449.

It is an arithmetic number, because the mean of its divisors is an integer number (49579449).

Almost surely, 2^99158897 is an apocalyptic number.

It is an amenable number.

99158897 is a deficient number, since it is larger than the sum of its proper divisors (1).

99158897 is an equidigital number, since it uses as much as digits as its factorization.

99158897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 56.

The square root of 99158897 is about 9957.8560443501. The cubic root of 99158897 is about 462.8538662165.

The spelling of 99158897 in words is "ninety-nine million, one hundred fifty-eight thousand, eight hundred ninety-seven".