91656250 has 56 divisors (see below), whose sum is σ = 196872480. Its totient is φ = 31350000.

The previous prime is 91656241. The next prime is 91656259. The reversal of 91656250 is 5265619.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91656241) and next prime (91656259).

It is not an unprimeable number, because it can be changed into a prime (91656259) 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 27 ways as a sum of consecutive naturals, for example, 218541 + ... + 218959.

It is an arithmetic number, because the mean of its divisors is an integer number (3515580).

Almost surely, 2^91656250 is an apocalyptic number.

91656250 is an abundant number, since it is smaller than the sum of its proper divisors (105216230).

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

91656250 is an frugal number, since it uses more digits than its factorization.

91656250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 91656250 is about 9573.7270694333. The cubic root of 91656250 is about 450.8727916904.

The spelling of 91656250 in words is "ninety-one million, six hundred fifty-six thousand, two hundred fifty".