91636501 has 4 divisors (see below), whose sum is σ = 99967104. Its totient is φ = 83305900.

The previous prime is 91636459. The next prime is 91636537. The reversal of 91636501 is 10563619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10563619 = 11 ⋅960329.

It is a cyclic number.

It is not a de Polignac number, because 91636501 - 2⁹ = 91635989 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91636541) 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 3 ways as a sum of consecutive naturals, for example, 4165285 + ... + 4165306.

It is an arithmetic number, because the mean of its divisors is an integer number (24991776).

Almost surely, 2^91636501 is an apocalyptic number.

It is an amenable number.

91636501 is a deficient number, since it is larger than the sum of its proper divisors (8330603).

91636501 is a wasteful number, since it uses less digits than its factorization.

91636501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330602.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 91636501 is about 9572.6955973749. The cubic root of 91636501 is about 450.8404064599.

The spelling of 91636501 in words is "ninety-one million, six hundred thirty-six thousand, five hundred one".