91276497 has 16 divisors (see below), whose sum is σ = 145626880. Its totient is φ = 56169936.

The previous prime is 91276483. The next prime is 91276529. The reversal of 91276497 is 79467219.

91276497 is a `hidden beast` number, since 91 + 2 + 76 + 497 = 666.

It is not a de Polignac number, because 91276497 - 2⁶ = 91276433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91276597) 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, 129673 + ... + 130374.

It is an arithmetic number, because the mean of its divisors is an integer number (9101680).

Almost surely, 2^91276497 is an apocalyptic number.

It is an amenable number.

91276497 is a deficient number, since it is larger than the sum of its proper divisors (54350383).

91276497 is a wasteful number, since it uses less digits than its factorization.

91276497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260069 (or 260063 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 91276497 is about 9553.8734029712. The cubic root of 91276497 is about 450.2492397069.

The spelling of 91276497 in words is "ninety-one million, two hundred seventy-six thousand, four hundred ninety-seven".