90406553 has 4 divisors (see below), whose sum is σ = 90427428. Its totient is φ = 90385680.

The previous prime is 90406549. The next prime is 90406567. The reversal of 90406553 is 35560409.

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 87759424 + 2647129 = 9368^2 + 1627^2 .

It is a cyclic number.

It is not a de Polignac number, because 90406553 - 2² = 90406549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90406523) 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, 1238 + ... + 13503.

It is an arithmetic number, because the mean of its divisors is an integer number (22606857).

Almost surely, 2^90406553 is an apocalyptic number.

It is an amenable number.

90406553 is a deficient number, since it is larger than the sum of its proper divisors (20875).

90406553 is a wasteful number, since it uses less digits than its factorization.

90406553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20874.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 90406553 is about 9508.2360614364. The cubic root of 90406553 is about 448.8142494838.

The spelling of 90406553 in words is "ninety million, four hundred six thousand, five hundred fifty-three".