90637007 has 4 divisors (see below), whose sum is σ = 90721176. Its totient is φ = 90552840.

The previous prime is 90637003. The next prime is 90637021. The reversal of 90637007 is 70073609.

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 90637007 - 2² = 90637003 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 (90637003) 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, 40448 + ... + 42629.

It is an arithmetic number, because the mean of its divisors is an integer number (22680294).

Almost surely, 2^90637007 is an apocalyptic number.

90637007 is a deficient number, since it is larger than the sum of its proper divisors (84169).

90637007 is a wasteful number, since it uses less digits than its factorization.

90637007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84168.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 90637007 is about 9520.3469999785. The cubic root of 90637007 is about 449.1952811495.

The spelling of 90637007 in words is "ninety million, six hundred thirty-seven thousand, seven".