13287831761 has 2 divisors, whose sum is σ = 13287831762. Its totient is φ = 13287831760.

The previous prime is 13287831757. The next prime is 13287831779. The reversal of 13287831761 is 16713878231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9649329361 + 3638502400 = 98231^2 + 60320^2 .

It is a cyclic number.

It is not a de Polignac number, because 13287831761 - 2² = 13287831757 is a prime.

It is a super-2 number, since 2×13287831761² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13287831751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6643915880 + 6643915881.

It is an arithmetic number, because the mean of its divisors is an integer number (6643915881).

Almost surely, 2^13287831761 is an apocalyptic number.

It is an amenable number.

13287831761 is a deficient number, since it is larger than the sum of its proper divisors (1).

13287831761 is an equidigital number, since it uses as much as digits as its factorization.

13287831761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The spelling of 13287831761 in words is "thirteen billion, two hundred eighty-seven million, eight hundred thirty-one thousand, seven hundred sixty-one".