91007697 has 16 divisors (see below), whose sum is σ = 133594560. Its totient is φ = 54648000.

The previous prime is 91007689. The next prime is 91007699. The reversal of 91007697 is 79670019.

It is not a de Polignac number, because 91007697 - 2³ = 91007689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91007699) 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, 9054 + ... + 16247.

It is an arithmetic number, because the mean of its divisors is an integer number (8349660).

Almost surely, 2^91007697 is an apocalyptic number.

It is an amenable number.

91007697 is a deficient number, since it is larger than the sum of its proper divisors (42586863).

91007697 is a wasteful number, since it uses less digits than its factorization.

91007697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25424.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 91007697 is about 9539.7954380584. The cubic root of 91007697 is about 449.8068257287.

The spelling of 91007697 in words is "ninety-one million, seven thousand, six hundred ninety-seven".