90523013 has 16 divisors (see below), whose sum is σ = 104880000. Its totient is φ = 76531392.

The previous prime is 90523003. The next prime is 90523061. The reversal of 90523013 is 31032509.

It is a happy number.

It is not a de Polignac number, because 90523013 - 2¹⁴ = 90506629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90523013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90523003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238658 + ... + 239036.

It is an arithmetic number, because the mean of its divisors is an integer number (6555000).

Almost surely, 2^90523013 is an apocalyptic number.

It is an amenable number.

90523013 is a deficient number, since it is larger than the sum of its proper divisors (14356987).

90523013 is a wasteful number, since it uses less digits than its factorization.

90523013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 90523013 is about 9514.3582547642. The cubic root of 90523013 is about 449.0068847809.

The spelling of 90523013 in words is "ninety million, five hundred twenty-three thousand, thirteen".