90955213 has 4 divisors (see below), whose sum is σ = 93413500. Its totient is φ = 88496928.

The previous prime is 90955201. The next prime is 90955217. The reversal of 90955213 is 31255909.

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 84695209 + 6260004 = 9203^2 + 2502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90955213 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 (90955217) 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, 1229088 + ... + 1229161.

It is an arithmetic number, because the mean of its divisors is an integer number (23353375).

Almost surely, 2^90955213 is an apocalyptic number.

It is an amenable number.

90955213 is a deficient number, since it is larger than the sum of its proper divisors (2458287).

90955213 is a wasteful number, since it uses less digits than its factorization.

90955213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458286.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 90955213 is about 9537.0442486129. The cubic root of 90955213 is about 449.7203414648.

The spelling of 90955213 in words is "ninety million, nine hundred fifty-five thousand, two hundred thirteen".