91250687 has 16 divisors (see below), whose sum is σ = 102905088. Its totient is φ = 80196480.

The previous prime is 91250681. The next prime is 91250699. The reversal of 91250687 is 78605219.

It is a cyclic number.

It is not a de Polignac number, because 91250687 - 2⁶ = 91250623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91250687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91250681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47783 + ... + 49655.

It is an arithmetic number, because the mean of its divisors is an integer number (6431568).

Almost surely, 2^91250687 is an apocalyptic number.

91250687 is a deficient number, since it is larger than the sum of its proper divisors (11654401).

91250687 is a wasteful number, since it uses less digits than its factorization.

91250687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 91250687 is about 9552.5225464272. The cubic root of 91250687 is about 450.2067971331.

The spelling of 91250687 in words is "ninety-one million, two hundred fifty thousand, six hundred eighty-seven".