91766351 has 4 divisors (see below), whose sum is σ = 92160432. Its totient is φ = 91372272.

The previous prime is 91766309. The next prime is 91766383. The reversal of 91766351 is 15366719.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91766351 - 2²² = 87572047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91766551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196691 + ... + 197156.

It is an arithmetic number, because the mean of its divisors is an integer number (23040108).

Almost surely, 2^91766351 is an apocalyptic number.

91766351 is a deficient number, since it is larger than the sum of its proper divisors (394081).

91766351 is a wasteful number, since it uses less digits than its factorization.

91766351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394080.

The product of its digits is 34020, while the sum is 38.

The square root of 91766351 is about 9579.4755075630. The cubic root of 91766351 is about 451.0532546753.

The spelling of 91766351 in words is "ninety-one million, seven hundred sixty-six thousand, three hundred fifty-one".