90429523 has 4 divisors (see below), whose sum is σ = 90903168. Its totient is φ = 89955880.

The previous prime is 90429509. The next prime is 90429529. The reversal of 90429523 is 32592409.

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

It is a cyclic number.

It is not a de Polignac number, because 90429523 - 2⁹ = 90429011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90429529) 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, 236536 + ... + 236917.

It is an arithmetic number, because the mean of its divisors is an integer number (22725792).

Almost surely, 2^90429523 is an apocalyptic number.

90429523 is a deficient number, since it is larger than the sum of its proper divisors (473645).

90429523 is a wasteful number, since it uses less digits than its factorization.

90429523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473644.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90429523 is about 9509.4438848967. The cubic root of 90429523 is about 448.8522570174.

The spelling of 90429523 in words is "ninety million, four hundred twenty-nine thousand, five hundred twenty-three".