978593913 has 24 divisors (see below), whose sum is σ = 1593552800. Its totient is φ = 593085240.

The previous prime is 978593851. The next prime is 978593921. The reversal of 978593913 is 319395879.

It is not a de Polignac number, because 978593913 - 2¹³ = 978585721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 978593913.

It is not an unprimeable number, because it can be changed into a prime (978593953) 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, 146503 + ... + 153036.

Almost surely, 2^978593913 is an apocalyptic number.

It is an amenable number.

978593913 is a deficient number, since it is larger than the sum of its proper divisors (614958887).

978593913 is a wasteful number, since it uses less digits than its factorization.

978593913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299570 (or 299553 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 978593913 is about 31282.4857228450. The cubic root of 978593913 is about 992.8131100166.

The spelling of 978593913 in words is "nine hundred seventy-eight million, five hundred ninety-three thousand, nine hundred thirteen".