90252289 has 8 divisors (see below), whose sum is σ = 91685952. Its totient is φ = 88823280.

The previous prime is 90252259. The next prime is 90252293. The reversal of 90252289 is 98225209.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90252289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90252209) 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, 77022 + ... + 78184.

It is an arithmetic number, because the mean of its divisors is an integer number (11460744).

Almost surely, 2^90252289 is an apocalyptic number.

It is an amenable number.

90252289 is a deficient number, since it is larger than the sum of its proper divisors (1433663).

90252289 is a wasteful number, since it uses less digits than its factorization.

90252289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 90252289 is about 9500.1204729203. The cubic root of 90252289 is about 448.5588281072.

The spelling of 90252289 in words is "ninety million, two hundred fifty-two thousand, two hundred eighty-nine".