31959234661 has 2 divisors, whose sum is σ = 31959234662. Its totient is φ = 31959234660.

The previous prime is 31959234569. The next prime is 31959234667. The reversal of 31959234661 is 16643295913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30824824900 + 1134409761 = 175570^2 + 33681^2 .

It is a cyclic number.

It is not a de Polignac number, because 31959234661 - 2⁹ = 31959234149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31959234667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15979617330 + 15979617331.

It is an arithmetic number, because the mean of its divisors is an integer number (15979617331).

Almost surely, 2^31959234661 is an apocalyptic number.

It is an amenable number.

31959234661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31959234661 is an equidigital number, since it uses as much as digits as its factorization.

31959234661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 49.

The spelling of 31959234661 in words is "thirty-one billion, nine hundred fifty-nine million, two hundred thirty-four thousand, six hundred sixty-one".