90374551 has 4 divisors (see below), whose sum is σ = 91647504. Its totient is φ = 89101600.

The previous prime is 90374509. The next prime is 90374617. The reversal of 90374551 is 15547309.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90374551 - 2¹³ = 90366359 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 (90374351) 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, 636370 + ... + 636511.

It is an arithmetic number, because the mean of its divisors is an integer number (22911876).

Almost surely, 2^90374551 is an apocalyptic number.

90374551 is a deficient number, since it is larger than the sum of its proper divisors (1272953).

90374551 is a wasteful number, since it uses less digits than its factorization.

90374551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272952.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 90374551 is about 9506.5530556559. The cubic root of 90374551 is about 448.7612863294.

The spelling of 90374551 in words is "ninety million, three hundred seventy-four thousand, five hundred fifty-one".