90450637 has 4 divisors (see below), whose sum is σ = 90487456. Its totient is φ = 90413820.

The previous prime is 90450593. The next prime is 90450641. The reversal of 90450637 is 73605409.

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.

It is a cyclic number.

It is not a de Polignac number, because 90450637 - 2⁷ = 90450509 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 (90450667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14439 + ... + 19732.

It is an arithmetic number, because the mean of its divisors is an integer number (22621864).

Almost surely, 2^90450637 is an apocalyptic number.

It is an amenable number.

90450637 is a deficient number, since it is larger than the sum of its proper divisors (36819).

90450637 is a wasteful number, since it uses less digits than its factorization.

90450637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36818.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 90450637 is about 9510.5539796586. The cubic root of 90450637 is about 448.8871878260.

The spelling of 90450637 in words is "ninety million, four hundred fifty thousand, six hundred thirty-seven".