31341772879 has 2 divisors, whose sum is σ = 31341772880. Its totient is φ = 31341772878.

The previous prime is 31341772789. The next prime is 31341772901. The reversal of 31341772879 is 97827714313.

Together with previous prime (31341772789) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31341772879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31341770879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670886439 + 15670886440.

It is an arithmetic number, because the mean of its divisors is an integer number (15670886440).

Almost surely, 2^31341772879 is an apocalyptic number.

31341772879 is a deficient number, since it is larger than the sum of its proper divisors (1).

31341772879 is an equidigital number, since it uses as much as digits as its factorization.

31341772879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 52.

The spelling of 31341772879 in words is "thirty-one billion, three hundred forty-one million, seven hundred seventy-two thousand, eight hundred seventy-nine".