31432057697 has 2 divisors, whose sum is σ = 31432057698. Its totient is φ = 31432057696.

The previous prime is 31432057693. The next prime is 31432057871. The reversal of 31432057697 is 79675023413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27627758656 + 3804299041 = 166216^2 + 61679^2 .

It is an emirp because it is prime and its reverse (79675023413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31432057697 - 2² = 31432057693 is a prime.

It is not a weakly prime, because it can be changed into another prime (31432057693) 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, 15716028848 + 15716028849.

It is an arithmetic number, because the mean of its divisors is an integer number (15716028849).

Almost surely, 2^31432057697 is an apocalyptic number.

It is an amenable number.

31432057697 is a deficient number, since it is larger than the sum of its proper divisors (1).

31432057697 is an equidigital number, since it uses as much as digits as its factorization.

31432057697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 31432057697 in words is "thirty-one billion, four hundred thirty-two million, fifty-seven thousand, six hundred ninety-seven".