31634814779 has 2 divisors, whose sum is σ = 31634814780. Its totient is φ = 31634814778.

The previous prime is 31634814719. The next prime is 31634814787. The reversal of 31634814779 is 97741843613.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31634814779 is a prime.

It is a super-2 number, since 2×31634814779² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31634814779.

It is not a weakly prime, because it can be changed into another prime (31634814709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15817407389 + 15817407390.

It is an arithmetic number, because the mean of its divisors is an integer number (15817407390).

Almost surely, 2^31634814779 is an apocalyptic number.

31634814779 is a deficient number, since it is larger than the sum of its proper divisors (1).

31634814779 is an equidigital number, since it uses as much as digits as its factorization.

31634814779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The spelling of 31634814779 in words is "thirty-one billion, six hundred thirty-four million, eight hundred fourteen thousand, seven hundred seventy-nine".