90931425 has 24 divisors (see below), whose sum is σ = 161906304. Its totient is φ = 44765760.

The previous prime is 90931409. The next prime is 90931429. The reversal of 90931425 is 52413909.

It is not a de Polignac number, because 90931425 - 2⁴ = 90931409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90931429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45657 + ... + 47606.

It is an arithmetic number, because the mean of its divisors is an integer number (6746096).

Almost surely, 2^90931425 is an apocalyptic number.

It is an amenable number.

90931425 is a deficient number, since it is larger than the sum of its proper divisors (70974879).

90931425 is a wasteful number, since it uses less digits than its factorization.

90931425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93289 (or 93284 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 90931425 is about 9535.7970301386. The cubic root of 90931425 is about 449.6811321298.

The spelling of 90931425 in words is "ninety million, nine hundred thirty-one thousand, four hundred twenty-five".