90646751 has 4 divisors (see below), whose sum is σ = 97619592. Its totient is φ = 83673912.

The previous prime is 90646729. The next prime is 90646753. The reversal of 90646751 is 15764609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15764609 = 7 ⋅2252087.

It is a cyclic number.

It is not a de Polignac number, because 90646751 - 2⁶ = 90646687 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 (90646753) 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, 3486401 + ... + 3486426.

It is an arithmetic number, because the mean of its divisors is an integer number (24404898).

Almost surely, 2^90646751 is an apocalyptic number.

90646751 is a deficient number, since it is larger than the sum of its proper divisors (6972841).

90646751 is a wasteful number, since it uses less digits than its factorization.

90646751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6972840.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 90646751 is about 9520.8587322783. The cubic root of 90646751 is about 449.2113775989.

The spelling of 90646751 in words is "ninety million, six hundred forty-six thousand, seven hundred fifty-one".