91297617 has 16 divisors (see below), whose sum is σ = 123950400. Its totient is φ = 59761152.

The previous prime is 91297607. The next prime is 91297621. The reversal of 91297617 is 71679219.

It is a happy number.

It is not a de Polignac number, because 91297617 - 2⁴ = 91297601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91297607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86509 + ... + 87557.

It is an arithmetic number, because the mean of its divisors is an integer number (7746900).

Almost surely, 2^91297617 is an apocalyptic number.

It is an amenable number.

91297617 is a deficient number, since it is larger than the sum of its proper divisors (32652783).

91297617 is a wasteful number, since it uses less digits than its factorization.

91297617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its digits is 47628, while the sum is 42.

The square root of 91297617 is about 9554.9786498977. The cubic root of 91297617 is about 450.2839639821.

The spelling of 91297617 in words is "ninety-one million, two hundred ninety-seven thousand, six hundred seventeen".