90517723 has 4 divisors (see below), whose sum is σ = 92443680. Its totient is φ = 88591768.

The previous prime is 90517711. The next prime is 90517727. The reversal of 90517723 is 32771509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32771509 = 67 ⋅489127.

It is a cyclic number.

It is not a de Polignac number, because 90517723 - 2¹⁷ = 90386651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90517727) 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, 962908 + ... + 963001.

It is an arithmetic number, because the mean of its divisors is an integer number (23110920).

Almost surely, 2^90517723 is an apocalyptic number.

90517723 is a deficient number, since it is larger than the sum of its proper divisors (1925957).

90517723 is a wasteful number, since it uses less digits than its factorization.

90517723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925956.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 90517723 is about 9514.0802498192. The cubic root of 90517723 is about 448.9981382290.

The spelling of 90517723 in words is "ninety million, five hundred seventeen thousand, seven hundred twenty-three".