91697456 has 40 divisors (see below), whose sum is σ = 188787024. Its totient is φ = 42997760.

The previous prime is 91697453. The next prime is 91697467. The reversal of 91697456 is 65479619.

It is a self number, because there is not a number n which added to its sum of digits gives 91697456.

It is not an unprimeable number, because it can be changed into a prime (91697453) 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 7 ways as a sum of consecutive naturals, for example, 120116 + ... + 120876.

Almost surely, 2^91697456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91697456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94393512).

91697456 is an abundant number, since it is smaller than the sum of its proper divisors (97089568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91697456 is a wasteful number, since it uses less digits than its factorization.

91697456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229 (or 1223 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 91697456 is about 9575.8788630600. The cubic root of 91697456 is about 450.9403480248.

The spelling of 91697456 in words is "ninety-one million, six hundred ninety-seven thousand, four hundred fifty-six".