97660091 has 4 divisors (see below), whose sum is σ = 97795152. Its totient is φ = 97525032.

The previous prime is 97660061. The next prime is 97660099. The reversal of 97660091 is 19006679.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97660091 - 2²² = 93465787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97660099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66440 + ... + 67893.

It is an arithmetic number, because the mean of its divisors is an integer number (24448788).

Almost surely, 2^97660091 is an apocalyptic number.

97660091 is a deficient number, since it is larger than the sum of its proper divisors (135061).

97660091 is a wasteful number, since it uses less digits than its factorization.

97660091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135060.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 97660091 is about 9882.3120270512. The cubic root of 97660091 is about 460.5099747400.

The spelling of 97660091 in words is "ninety-seven million, six hundred sixty thousand, ninety-one".