90572729 has 16 divisors (see below), whose sum is σ = 99792000. Its totient is φ = 81693696.

The previous prime is 90572723. The next prime is 90572737. The reversal of 90572729 is 92727509.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90572729 - 2¹² = 90568633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90572723) 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, 201497 + ... + 201945.

It is an arithmetic number, because the mean of its divisors is an integer number (6237000).

Almost surely, 2^90572729 is an apocalyptic number.

It is an amenable number.

90572729 is a deficient number, since it is larger than the sum of its proper divisors (9219271).

90572729 is a wasteful number, since it uses less digits than its factorization.

90572729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 90572729 is about 9516.9705789185. The cubic root of 90572729 is about 449.0890691897.

The spelling of 90572729 in words is "ninety million, five hundred seventy-two thousand, seven hundred twenty-nine".