990819025 has 12 divisors (see below), whose sum is σ = 1404132352. Its totient is φ = 679418640.

The previous prime is 990819023. The next prime is 990819031. The reversal of 990819025 is 520918099.

It is not a de Polignac number, because 990819025 - 2¹ = 990819023 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (990819023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2830737 + ... + 2831086.

Almost surely, 2^990819025 is an apocalyptic number.

It is an amenable number.

990819025 is a deficient number, since it is larger than the sum of its proper divisors (413313327).

990819025 is a wasteful number, since it uses less digits than its factorization.

990819025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661840 (or 5661835 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 990819025 is about 31477.2779159825. The cubic root of 990819025 is about 996.9302613470.

The spelling of 990819025 in words is "nine hundred ninety million, eight hundred nineteen thousand, twenty-five".