13697159881 has 2 divisors, whose sum is σ = 13697159882. Its totient is φ = 13697159880.

The previous prime is 13697159867. The next prime is 13697159923. The reversal of 13697159881 is 18895179631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12765384256 + 931775625 = 112984^2 + 30525^2 .

It is a cyclic number.

It is not a de Polignac number, because 13697159881 - 2²¹ = 13695062729 is a prime.

It is a super-2 number, since 2×13697159881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13697159681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6848579940 + 6848579941.

It is an arithmetic number, because the mean of its divisors is an integer number (6848579941).

Almost surely, 2^13697159881 is an apocalyptic number.

It is an amenable number.

13697159881 is a deficient number, since it is larger than the sum of its proper divisors (1).

13697159881 is an equidigital number, since it uses as much as digits as its factorization.

13697159881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 58.

The spelling of 13697159881 in words is "thirteen billion, six hundred ninety-seven million, one hundred fifty-nine thousand, eight hundred eighty-one".