3137995681 has 2 divisors, whose sum is σ = 3137995682. Its totient is φ = 3137995680.

The previous prime is 3137995669. The next prime is 3137995697. The reversal of 3137995681 is 1865997313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2617243281 + 520752400 = 51159^2 + 22820^2 .

It is an emirp because it is prime and its reverse (1865997313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3137995681 - 2⁹ = 3137995169 is a prime.

It is a super-2 number, since 2×3137995681² = 19694033787949307522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3137995381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1568997840 + 1568997841.

It is an arithmetic number, because the mean of its divisors is an integer number (1568997841).

Almost surely, 2^3137995681 is an apocalyptic number.

It is an amenable number.

3137995681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3137995681 is an equidigital number, since it uses as much as digits as its factorization.

3137995681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The square root of 3137995681 is about 56017.8157464212. The cubic root of 3137995681 is about 1464.0327116585.

The spelling of 3137995681 in words is "three billion, one hundred thirty-seven million, nine hundred ninety-five thousand, six hundred eighty-one".