978159348931 has 2 divisors, whose sum is σ = 978159348932. Its totient is φ = 978159348930.

The previous prime is 978159348923. The next prime is 978159348983. The reversal of 978159348931 is 139843951879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978159348931 - 2³ = 978159348923 is a prime.

It is a super-2 number, since 2×978159348931² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (978159048931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489079674465 + 489079674466.

It is an arithmetic number, because the mean of its divisors is an integer number (489079674466).

Almost surely, 2^978159348931 is an apocalyptic number.

978159348931 is a deficient number, since it is larger than the sum of its proper divisors (1).

978159348931 is an equidigital number, since it uses as much as digits as its factorization.

978159348931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 67.

The spelling of 978159348931 in words is "nine hundred seventy-eight billion, one hundred fifty-nine million, three hundred forty-eight thousand, nine hundred thirty-one".