91506751 has 8 divisors (see below), whose sum is σ = 104643104. Its totient is φ = 78386400.

The previous prime is 91506739. The next prime is 91506757. The reversal of 91506751 is 15760519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91506751 - 2¹⁷ = 91375679 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 (91506757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13201 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (13080388).

Almost surely, 2^91506751 is an apocalyptic number.

91506751 is a deficient number, since it is larger than the sum of its proper divisors (13136353).

91506751 is a wasteful number, since it uses less digits than its factorization.

91506751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 91506751 is about 9565.9161087687. The cubic root of 91506751 is about 450.6275212280.

The spelling of 91506751 in words is "ninety-one million, five hundred six thousand, seven hundred fifty-one".