31988123879 has 2 divisors, whose sum is σ = 31988123880. Its totient is φ = 31988123878.

The previous prime is 31988123803. The next prime is 31988123929. The reversal of 31988123879 is 97832188913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31988123879 - 2⁸ = 31988123623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31988423879) 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, 15994061939 + 15994061940.

It is an arithmetic number, because the mean of its divisors is an integer number (15994061940).

Almost surely, 2^31988123879 is an apocalyptic number.

31988123879 is a deficient number, since it is larger than the sum of its proper divisors (1).

31988123879 is an equidigital number, since it uses as much as digits as its factorization.

31988123879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 59.

The spelling of 31988123879 in words is "thirty-one billion, nine hundred eighty-eight million, one hundred twenty-three thousand, eight hundred seventy-nine".