90651717 has 80 divisors (see below), whose sum is σ = 160997760. Its totient is φ = 50295168.

The previous prime is 90651713. The next prime is 90651721. The reversal of 90651717 is 71715609.

It is an interprime number because it is at equal distance from previous prime (90651713) and next prime (90651721).

It is not a de Polignac number, because 90651717 - 2² = 90651713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90651713) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 460063 + ... + 460259.

It is an arithmetic number, because the mean of its divisors is an integer number (2012472).

Almost surely, 2^90651717 is an apocalyptic number.

It is an amenable number.

90651717 is a deficient number, since it is larger than the sum of its proper divisors (70346043).

90651717 is a wasteful number, since it uses less digits than its factorization.

90651717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 90651717 is about 9521.1195245097. The cubic root of 90651717 is about 449.2195806617.

The spelling of 90651717 in words is "ninety million, six hundred fifty-one thousand, seven hundred seventeen".