90402253 has 4 divisors (see below), whose sum is σ = 92607228. Its totient is φ = 88197280.

The previous prime is 90402239. The next prime is 90402269. The reversal of 90402253 is 35220409.

It is a happy number.

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 46485124 + 43917129 = 6818^2 + 6627^2 .

It is a cyclic number.

It is not a de Polignac number, because 90402253 - 2⁹ = 90401741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90402203) 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, 1102426 + ... + 1102507.

It is an arithmetic number, because the mean of its divisors is an integer number (23151807).

Almost surely, 2^90402253 is an apocalyptic number.

It is an amenable number.

90402253 is a deficient number, since it is larger than the sum of its proper divisors (2204975).

90402253 is a wasteful number, since it uses less digits than its factorization.

90402253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204974.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 90402253 is about 9508.0099389935. The cubic root of 90402253 is about 448.8071337316.

The spelling of 90402253 in words is "ninety million, four hundred two thousand, two hundred fifty-three".