91640476 has 12 divisors (see below), whose sum is σ = 161525560. Its totient is φ = 45490320.

The previous prime is 91640473. The next prime is 91640519. The reversal of 91640476 is 67404619.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91640473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81855 + ... + 82966.

Almost surely, 2^91640476 is an apocalyptic number.

It is an amenable number.

91640476 is a deficient number, since it is larger than the sum of its proper divisors (69885084).

91640476 is a wasteful number, since it uses less digits than its factorization.

91640476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164964 (or 164962 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 91640476 is about 9572.9032168930. The cubic root of 91640476 is about 450.8469252040.

The spelling of 91640476 in words is "ninety-one million, six hundred forty thousand, four hundred seventy-six".