90759913 has 4 divisors (see below), whose sum is σ = 91658628. Its totient is φ = 89861200.

The previous prime is 90759899. The next prime is 90759917. The reversal of 90759913 is 31995709.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85433049 + 5326864 = 9243^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 90759913 - 2⁹ = 90759401 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 90759913.

It is not an unprimeable number, because it can be changed into a prime (90759917) 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, 449206 + ... + 449407.

It is an arithmetic number, because the mean of its divisors is an integer number (22914657).

Almost surely, 2^90759913 is an apocalyptic number.

It is an amenable number.

90759913 is a deficient number, since it is larger than the sum of its proper divisors (898715).

90759913 is a wasteful number, since it uses less digits than its factorization.

90759913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898714.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 90759913 is about 9526.7997249864. The cubic root of 90759913 is about 449.3982293749.

The spelling of 90759913 in words is "ninety million, seven hundred fifty-nine thousand, nine hundred thirteen".