91253668 has 24 divisors (see below), whose sum is σ = 174623904. Its totient is φ = 41380800.

The previous prime is 91253647. The next prime is 91253693. The reversal of 91253668 is 86635219.

It is a self number, because there is not a number n which added to its sum of digits gives 91253668.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18328 + ... + 22768.

It is an arithmetic number, because the mean of its divisors is an integer number (7275996).

Almost surely, 2^91253668 is an apocalyptic number.

It is an amenable number.

91253668 is a deficient number, since it is larger than the sum of its proper divisors (83370236).

91253668 is a wasteful number, since it uses less digits than its factorization.

91253668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923 (or 4921 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 91253668 is about 9552.6785772369. The cubic root of 91253668 is about 450.2116995687.

The spelling of 91253668 in words is "ninety-one million, two hundred fifty-three thousand, six hundred sixty-eight".