80990625 has 48 divisors (see below), whose sum is σ = 138366144. Its totient is φ = 42120000.

The previous prime is 80990617. The next prime is 80990627. The reversal of 80990625 is 52609908.

It is a happy number.

It is not a de Polignac number, because 80990625 - 2³ = 80990617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80990627) 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 47 ways as a sum of consecutive naturals, for example, 496794 + ... + 496956.

It is an arithmetic number, because the mean of its divisors is an integer number (2882628).

Almost surely, 2^80990625 is an apocalyptic number.

It is an amenable number.

80990625 is a deficient number, since it is larger than the sum of its proper divisors (57375519).

80990625 is an equidigital number, since it uses as much as digits as its factorization.

80990625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 80990625 is about 8999.4791515954. The cubic root of 80990625 is about 432.6581777448.

The spelling of 80990625 in words is "eighty million, nine hundred ninety thousand, six hundred twenty-five".