91214649 has 24 divisors (see below), whose sum is σ = 141055200. Its totient is φ = 56626560.

The previous prime is 91214597. The next prime is 91214659. The reversal of 91214649 is 94641219.

It is a happy number.

91214649 is a `hidden beast` number, since 9 + 1 + 2 + 1 + 4 + 649 = 666.

It is not a de Polignac number, because 91214649 - 2⁷ = 91214521 is a prime.

It is a super-2 number, since 2×91214649² = 16640224384386402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91214659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5569 + ... + 14609.

It is an arithmetic number, because the mean of its divisors is an integer number (5877300).

Almost surely, 2^91214649 is an apocalyptic number.

It is an amenable number.

91214649 is a deficient number, since it is larger than the sum of its proper divisors (49840551).

91214649 is a wasteful number, since it uses less digits than its factorization.

91214649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9125 (or 9122 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 91214649 is about 9550.6360521172. The cubic root of 91214649 is about 450.1475220034.

The spelling of 91214649 in words is "ninety-one million, two hundred fourteen thousand, six hundred forty-nine".