97791157 has 8 divisors (see below), whose sum is σ = 108993600. Its totient is φ = 87194304.

The previous prime is 97791149. The next prime is 97791167. The reversal of 97791157 is 75119779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97791157 - 2³ = 97791149 is a prime.

It is a super-2 number, since 2×97791157² = 19126220774797298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97791167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151057 + ... + 151702.

It is an arithmetic number, because the mean of its divisors is an integer number (13624200).

Almost surely, 2^97791157 is an apocalyptic number.

It is an amenable number.

97791157 is a deficient number, since it is larger than the sum of its proper divisors (11202443).

97791157 is a wasteful number, since it uses less digits than its factorization.

97791157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302795.

The product of its digits is 138915, while the sum is 46.

The square root of 97791157 is about 9888.9411465536. The cubic root of 97791157 is about 460.7158937897.

The spelling of 97791157 in words is "ninety-seven million, seven hundred ninety-one thousand, one hundred fifty-seven".