97163691 has 4 divisors (see below), whose sum is σ = 129551592. Its totient is φ = 64775792.

The previous prime is 97163683. The next prime is 97163699. The reversal of 97163691 is 19636179.

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

It is an interprime number because it is at equal distance from previous prime (97163683) and next prime (97163699).

It is a cyclic number.

It is not a de Polignac number, because 97163691 - 2³ = 97163683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97163699) 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, 16193946 + ... + 16193951.

It is an arithmetic number, because the mean of its divisors is an integer number (32387898).

Almost surely, 2^97163691 is an apocalyptic number.

97163691 is a deficient number, since it is larger than the sum of its proper divisors (32387901).

97163691 is a wasteful number, since it uses less digits than its factorization.

97163691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32387900.

The product of its digits is 61236, while the sum is 42.

The square root of 97163691 is about 9857.1644502869. The cubic root of 97163691 is about 459.7284014229.

The spelling of 97163691 in words is "ninety-seven million, one hundred sixty-three thousand, six hundred ninety-one".