90729575 has 6 divisors (see below), whose sum is σ = 112504704. Its totient is φ = 72583640.

The previous prime is 90729559. The next prime is 90729589. The reversal of 90729575 is 57592709.

It is not a de Polignac number, because 90729575 - 2⁴ = 90729559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1814567 + ... + 1814616.

It is an arithmetic number, because the mean of its divisors is an integer number (18750784).

Almost surely, 2^90729575 is an apocalyptic number.

90729575 is a deficient number, since it is larger than the sum of its proper divisors (21775129).

90729575 is a wasteful number, since it uses less digits than its factorization.

90729575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629193 (or 3629188 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 90729575 is about 9525.2073468245. The cubic root of 90729575 is about 449.3481508677.

The spelling of 90729575 in words is "ninety million, seven hundred twenty-nine thousand, five hundred seventy-five".