97320691 has 16 divisors (see below), whose sum is σ = 107856000. Its totient is φ = 87251328.

The previous prime is 97320611. The next prime is 97320709. The reversal of 97320691 is 19602379.

It is a cyclic number.

It is not a de Polignac number, because 97320691 - 2¹¹ = 97318643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97320691.

It is not an unprimeable number, because it can be changed into a prime (97320611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90505 + ... + 91573.

It is an arithmetic number, because the mean of its divisors is an integer number (6741000).

Almost surely, 2^97320691 is an apocalyptic number.

97320691 is a deficient number, since it is larger than the sum of its proper divisors (10535309).

97320691 is a wasteful number, since it uses less digits than its factorization.

97320691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 97320691 is about 9865.1249865372. The cubic root of 97320691 is about 459.9758824785.

The spelling of 97320691 in words is "ninety-seven million, three hundred twenty thousand, six hundred ninety-one".