97811157 has 16 divisors (see below), whose sum is σ = 136967040. Its totient is φ = 61968192.

The previous prime is 97811143. The next prime is 97811179. The reversal of 97811157 is 75111879.

It is not a de Polignac number, because 97811157 - 2⁴ = 97811141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97811137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6319 + ... + 15347.

It is an arithmetic number, because the mean of its divisors is an integer number (8560440).

Almost surely, 2^97811157 is an apocalyptic number.

It is an amenable number.

97811157 is a deficient number, since it is larger than the sum of its proper divisors (39155883).

97811157 is a wasteful number, since it uses less digits than its factorization.

97811157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9212.

The product of its digits is 17640, while the sum is 39.

The square root of 97811157 is about 9889.9523254665. The cubic root of 97811157 is about 460.7472997984.

The spelling of 97811157 in words is "ninety-seven million, eight hundred eleven thousand, one hundred fifty-seven".