3129731137 has 8 divisors (see below), whose sum is σ = 3403852200. Its totient is φ = 2860377600.

The previous prime is 3129731123. The next prime is 3129731149. The reversal of 3129731137 is 7311379213.

It is a Cunningham number, because it is equal to 55944²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 118026496 + 3011704641 = 10864^2 + 54879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3129731137 - 2³¹ = 982247489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3129731096 and 3129731105.

It is not an unprimeable number, because it can be changed into a prime (3129731107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190512 + ... + 1193137.

It is an arithmetic number, because the mean of its divisors is an integer number (425481525).

Almost surely, 2^3129731137 is an apocalyptic number.

It is an amenable number.

3129731137 is a deficient number, since it is larger than the sum of its proper divisors (274121063).

3129731137 is a wasteful number, since it uses less digits than its factorization.

3129731137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383763.

The product of its digits is 23814, while the sum is 37.

The square root of 3129731137 is about 55944.0000089375. Note that the first 5 decimals coincide. The cubic root of 3129731137 is about 1462.7463066008.

The spelling of 3129731137 in words is "three billion, one hundred twenty-nine million, seven hundred thirty-one thousand, one hundred thirty-seven".