31012379 has 2 divisors, whose sum is σ = 31012380. Its totient is φ = 31012378.

The previous prime is 31012363. The next prime is 31012381. The reversal of 31012379 is 97321013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31012379 - 2⁴ = 31012363 is a prime.

Together with 31012381, 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 (31012309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506189 + 15506190.

It is an arithmetic number, because the mean of its divisors is an integer number (15506190).

Almost surely, 2^31012379 is an apocalyptic number.

31012379 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012379 is an equidigital number, since it uses as much as digits as its factorization.

31012379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 31012379 is about 5568.8759188906. The cubic root of 31012379 is about 314.1798738156.

The spelling of 31012379 in words is "thirty-one million, twelve thousand, three hundred seventy-nine".