91736690 has 24 divisors (see below), whose sum is σ = 169734852. Its totient is φ = 35697600.

The previous prime is 91736651. The next prime is 91736699. The reversal of 91736690 is 9663719.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 74356129 + 17380561 = 8623^2 + 4169^2 .

It is a super-2 number, since 2×91736690² = 16831240584312200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91736699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10340 + ... + 17040.

Almost surely, 2^91736690 is an apocalyptic number.

91736690 is a deficient number, since it is larger than the sum of its proper divisors (77998162).

91736690 is a wasteful number, since it uses less digits than its factorization.

91736690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782 (or 6745 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 91736690 is about 9577.9272287902. The cubic root of 91736690 is about 451.0046525021.

The spelling of 91736690 in words is "ninety-one million, seven hundred thirty-six thousand, six hundred ninety".