91097995 has 12 divisors (see below), whose sum is σ = 112963680. Its totient is φ = 70523760.

The previous prime is 91097987. The next prime is 91098031. The reversal of 91097995 is 59979019.

It is not a de Polignac number, because 91097995 - 2³ = 91097987 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4675 + ... + 14284.

It is an arithmetic number, because the mean of its divisors is an integer number (9413640).

Almost surely, 2^91097995 is an apocalyptic number.

91097995 is a deficient number, since it is larger than the sum of its proper divisors (21865685).

91097995 is a wasteful number, since it uses less digits than its factorization.

91097995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19026 (or 18995 counting only the distinct ones).

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 91097995 is about 9544.5269657537. The cubic root of 91097995 is about 449.9555429332.

The spelling of 91097995 in words is "ninety-one million, ninety-seven thousand, nine hundred ninety-five".