31780848839 has 2 divisors, whose sum is σ = 31780848840. Its totient is φ = 31780848838.

The previous prime is 31780848829. The next prime is 31780848859. The reversal of 31780848839 is 93884808713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31780848839 - 2¹² = 31780844743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31780848829) 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, 15890424419 + 15890424420.

It is an arithmetic number, because the mean of its divisors is an integer number (15890424420).

Almost surely, 2^31780848839 is an apocalyptic number.

31780848839 is a deficient number, since it is larger than the sum of its proper divisors (1).

31780848839 is an equidigital number, since it uses as much as digits as its factorization.

31780848839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 31780848839 in words is "thirty-one billion, seven hundred eighty million, eight hundred forty-eight thousand, eight hundred thirty-nine".