91949164 has 6 divisors (see below), whose sum is σ = 160911044. Its totient is φ = 45974580.

The previous prime is 91949083. The next prime is 91949167. The reversal of 91949164 is 46194919.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91949164.

It is not an unprimeable number, because it can be changed into a prime (91949167) 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 as a sum of consecutive naturals, namely, 11493642 + ... + 11493649.

Almost surely, 2^91949164 is an apocalyptic number.

It is an amenable number.

91949164 is a deficient number, since it is larger than the sum of its proper divisors (68961880).

91949164 is a wasteful number, since it uses less digits than its factorization.

91949164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22987295 (or 22987293 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 91949164 is about 9589.0126707602. The cubic root of 91949164 is about 451.3525789976.

The spelling of 91949164 in words is "ninety-one million, nine hundred forty-nine thousand, one hundred sixty-four".