31120079 has 2 divisors, whose sum is σ = 31120080. Its totient is φ = 31120078.

The previous prime is 31120073. The next prime is 31120091. The reversal of 31120079 is 97002113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31120079 - 2¹² = 31115983 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31120073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560039 + 15560040.

It is an arithmetic number, because the mean of its divisors is an integer number (15560040).

Almost surely, 2^31120079 is an apocalyptic number.

31120079 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120079 is an equidigital number, since it uses as much as digits as its factorization.

31120079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 31120079 is about 5578.5373531061. The cubic root of 31120079 is about 314.5431489432.

The spelling of 31120079 in words is "thirty-one million, one hundred twenty thousand, seventy-nine".