979439409 has 24 divisors (see below), whose sum is σ = 1526004480. Its totient is φ = 601769952.

The previous prime is 979439407. The next prime is 979439449. The reversal of 979439409 is 904934979.

It is not a de Polignac number, because 979439409 - 2¹ = 979439407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (979439401) 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, 70752 + ... + 83454.

It is an arithmetic number, because the mean of its divisors is an integer number (63583520).

Almost surely, 2^979439409 is an apocalyptic number.

It is an amenable number.

979439409 is a deficient number, since it is larger than the sum of its proper divisors (546565071).

979439409 is a wasteful number, since it uses less digits than its factorization.

979439409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381 (or 13378 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 979439409 is about 31295.9966928679. The cubic root of 979439409 is about 993.0989547945.

The spelling of 979439409 in words is "nine hundred seventy-nine million, four hundred thirty-nine thousand, four hundred nine".