990078903 has 32 divisors (see below), whose sum is σ = 1616670720. Its totient is φ = 593844480.

The previous prime is 990078877. The next prime is 990078989. The reversal of 990078903 is 309870099.

It is a happy number.

It is not a de Polignac number, because 990078903 - 2⁵ = 990078871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990078203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11626 + ... + 45992.

It is an arithmetic number, because the mean of its divisors is an integer number (50520960).

Almost surely, 2^990078903 is an apocalyptic number.

990078903 is a deficient number, since it is larger than the sum of its proper divisors (626591817).

990078903 is a wasteful number, since it uses less digits than its factorization.

990078903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34484 (or 34478 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 990078903 is about 31465.5192711005. The cubic root of 990078903 is about 996.6819705235.

The spelling of 990078903 in words is "nine hundred ninety million, seventy-eight thousand, nine hundred three".