31396957589 has 2 divisors, whose sum is σ = 31396957590. Its totient is φ = 31396957588.

The previous prime is 31396957519. The next prime is 31396957591. The reversal of 31396957589 is 98575969313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26980690564 + 4416267025 = 164258^2 + 66455^2 .

It is an emirp because it is prime and its reverse (98575969313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31396957589 - 2¹² = 31396953493 is a prime.

Together with 31396957591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31396957519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15698478794 + 15698478795.

It is an arithmetic number, because the mean of its divisors is an integer number (15698478795).

Almost surely, 2^31396957589 is an apocalyptic number.

It is an amenable number.

31396957589 is a deficient number, since it is larger than the sum of its proper divisors (1).

31396957589 is an equidigital number, since it uses as much as digits as its factorization.

31396957589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55112400, while the sum is 65.

The spelling of 31396957589 in words is "thirty-one billion, three hundred ninety-six million, nine hundred fifty-seven thousand, five hundred eighty-nine".