979951331 has 2 divisors, whose sum is σ = 979951332. Its totient is φ = 979951330.

The previous prime is 979951283. The next prime is 979951333. The reversal of 979951331 is 133159979.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 979951331 - 2¹⁴ = 979934947 is a prime.

It is a super-2 number, since 2×979951331² = 1920609222257343122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 979951333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (979951333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489975665 + 489975666.

It is an arithmetic number, because the mean of its divisors is an integer number (489975666).

Almost surely, 2^979951331 is an apocalyptic number.

979951331 is a deficient number, since it is larger than the sum of its proper divisors (1).

979951331 is an equidigital number, since it uses as much as digits as its factorization.

979951331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229635, while the sum is 47.

The square root of 979951331 is about 31304.1743382572. The cubic root of 979951331 is about 993.2719451300.

The spelling of 979951331 in words is "nine hundred seventy-nine million, nine hundred fifty-one thousand, three hundred thirty-one".