90523507 has 4 divisors (see below), whose sum is σ = 91402480. Its totient is φ = 89644536.

The previous prime is 90523483. The next prime is 90523513. The reversal of 90523507 is 70532509.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90523507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90523547) 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, 439332 + ... + 439537.

It is an arithmetic number, because the mean of its divisors is an integer number (22850620).

Almost surely, 2^90523507 is an apocalyptic number.

90523507 is a deficient number, since it is larger than the sum of its proper divisors (878973).

90523507 is a wasteful number, since it uses less digits than its factorization.

90523507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878972.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 90523507 is about 9514.3842154918. The cubic root of 90523507 is about 449.0077015493.

The spelling of 90523507 in words is "ninety million, five hundred twenty-three thousand, five hundred seven".