90620553 has 4 divisors (see below), whose sum is σ = 120827408. Its totient is φ = 60413700.

The previous prime is 90620549. The next prime is 90620561. The reversal of 90620553 is 35502609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35502609 = 3 ⋅11834203.

It is not a de Polignac number, because 90620553 - 2² = 90620549 is a prime.

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 90620553.

It is not an unprimeable number, because it can be changed into a prime (90620053) 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, 15103423 + ... + 15103428.

It is an arithmetic number, because the mean of its divisors is an integer number (30206852).

Almost surely, 2^90620553 is an apocalyptic number.

It is an amenable number.

90620553 is a deficient number, since it is larger than the sum of its proper divisors (30206855).

90620553 is a wasteful number, since it uses less digits than its factorization.

90620553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30206854.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 90620553 is about 9519.4828115817. The cubic root of 90620553 is about 449.1680976009.

The spelling of 90620553 in words is "ninety million, six hundred twenty thousand, five hundred fifty-three".