91817792 has 28 divisors (see below), whose sum is σ = 198766176. Its totient is φ = 41735040.

The previous prime is 91817777. The next prime is 91817801. The reversal of 91817792 is 29771819.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64508 + ... + 65915.

It is an arithmetic number, because the mean of its divisors is an integer number (7098792).

Almost surely, 2^91817792 is an apocalyptic number.

It is an amenable number.

91817792 is an abundant number, since it is smaller than the sum of its proper divisors (106948384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91817792 is a wasteful number, since it uses less digits than its factorization.

91817792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130446 (or 130436 counting only the distinct ones).

The product of its digits is 63504, while the sum is 44.

The square root of 91817792 is about 9582.1600905015. The cubic root of 91817792 is about 451.1375204803.

The spelling of 91817792 in words is "ninety-one million, eight hundred seventeen thousand, seven hundred ninety-two".