90745907 has 4 divisors (see below), whose sum is σ = 103709616. Its totient is φ = 77782200.

The previous prime is 90745891. The next prime is 90745961. The reversal of 90745907 is 70954709.

It is a happy number.

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 90745907 - 2⁴ = 90745891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90745607) 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, 6481844 + ... + 6481857.

It is an arithmetic number, because the mean of its divisors is an integer number (25927404).

Almost surely, 2^90745907 is an apocalyptic number.

90745907 is a deficient number, since it is larger than the sum of its proper divisors (12963709).

90745907 is a wasteful number, since it uses less digits than its factorization.

90745907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963708.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 90745907 is about 9526.0646124200. The cubic root of 90745907 is about 449.3751112559.

The spelling of 90745907 in words is "ninety million, seven hundred forty-five thousand, nine hundred seven".