90289597 has 4 divisors (see below), whose sum is σ = 90677340. Its totient is φ = 89901856.

The previous prime is 90289553. The next prime is 90289603. The reversal of 90289597 is 79598209.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62188996 + 28100601 = 7886^2 + 5301^2 .

It is a cyclic number.

It is not a de Polignac number, because 90289597 - 2¹⁹ = 89765309 is a prime.

It is a super-2 number, since 2×90289597² = 16304422652844818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90289597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90289547) 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, 193522 + ... + 193987.

It is an arithmetic number, because the mean of its divisors is an integer number (22669335).

Almost surely, 2^90289597 is an apocalyptic number.

It is an amenable number.

90289597 is a deficient number, since it is larger than the sum of its proper divisors (387743).

90289597 is a wasteful number, since it uses less digits than its factorization.

90289597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387742.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 90289597 is about 9502.0838240883. The cubic root of 90289597 is about 448.6206271949.

The spelling of 90289597 in words is "ninety million, two hundred eighty-nine thousand, five hundred ninety-seven".