90134569 has 8 divisors (see below), whose sum is σ = 105113600. Its totient is φ = 77257908.

The previous prime is 90134549. The next prime is 90134573. The reversal of 90134569 is 96543109.

It is a de Polignac number, because none of the positive numbers 2^k-90134569 is a prime.

It is a super-2 number, since 2×90134569² = 16248481057631522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90134509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131049 + ... + 131734.

It is an arithmetic number, because the mean of its divisors is an integer number (13139200).

Almost surely, 2^90134569 is an apocalyptic number.

It is an amenable number.

90134569 is a deficient number, since it is larger than the sum of its proper divisors (14979031).

90134569 is an equidigital number, since it uses as much as digits as its factorization.

90134569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262804 (or 262790 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 90134569 is about 9493.9227403640. The cubic root of 90134569 is about 448.3637182995.

The spelling of 90134569 in words is "ninety million, one hundred thirty-four thousand, five hundred sixty-nine".