113731997881 has 2 divisors, whose sum is σ = 113731997882. Its totient is φ = 113731997880.

The previous prime is 113731997867. The next prime is 113731997903. The reversal of 113731997881 is 188799137311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84879578281 + 28852419600 = 291341^2 + 169860^2 .

It is a cyclic number.

It is not a de Polignac number, because 113731997881 - 2¹³ = 113731989689 is a prime.

It is a super-2 number, since 2×113731997881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113731997681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56865998940 + 56865998941.

It is an arithmetic number, because the mean of its divisors is an integer number (56865998941).

Almost surely, 2^113731997881 is an apocalyptic number.

It is an amenable number.

113731997881 is a deficient number, since it is larger than the sum of its proper divisors (1).

113731997881 is an equidigital number, since it uses as much as digits as its factorization.

113731997881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 58.

The spelling of 113731997881 in words is "one hundred thirteen billion, seven hundred thirty-one million, nine hundred ninety-seven thousand, eight hundred eighty-one".