91356751 has 4 divisors (see below), whose sum is σ = 91390104. Its totient is φ = 91323400.

The previous prime is 91356739. The next prime is 91356763. The reversal of 91356751 is 15765319.

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

It is an interprime number because it is at equal distance from previous prime (91356739) and next prime (91356763).

It is a cyclic number.

It is not a de Polignac number, because 91356751 - 2⁵ = 91356719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91356751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91356781) 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, 12160 + ... + 18181.

It is an arithmetic number, because the mean of its divisors is an integer number (22847526).

Almost surely, 2^91356751 is an apocalyptic number.

91356751 is the 4275-th centered decagonal number.

91356751 is a deficient number, since it is larger than the sum of its proper divisors (33353).

91356751 is a wasteful number, since it uses less digits than its factorization.

91356751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33352.

The product of its digits is 28350, while the sum is 37.

The square root of 91356751 is about 9558.0725567449. The cubic root of 91356751 is about 450.3811601851.

The spelling of 91356751 in words is "ninety-one million, three hundred fifty-six thousand, seven hundred fifty-one".