90253213 has 4 divisors (see below), whose sum is σ = 91052028. Its totient is φ = 89454400.

The previous prime is 90253193. The next prime is 90253243. The reversal of 90253213 is 31235209.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31235209 = 313 ⋅99793.

It can be written as a sum of positive squares in 2 ways, for example, as 2137444 + 88115769 = 1462^2 + 9387^2 .

It is a cyclic number.

It is not a de Polignac number, because 90253213 - 2⁵ = 90253181 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 (90253243) 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, 399238 + ... + 399463.

It is an arithmetic number, because the mean of its divisors is an integer number (22763007).

Almost surely, 2^90253213 is an apocalyptic number.

It is an amenable number.

90253213 is a deficient number, since it is larger than the sum of its proper divisors (798815).

90253213 is a wasteful number, since it uses less digits than its factorization.

90253213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798814.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 90253213 is about 9500.1691037581. The cubic root of 90253213 is about 448.5603588788.

The spelling of 90253213 in words is "ninety million, two hundred fifty-three thousand, two hundred thirteen".