1137733981 has 8 divisors (see below), whose sum is σ = 1159998840. Its totient is φ = 1115649792.

The previous prime is 1137733973. The next prime is 1137733991. The reversal of 1137733981 is 1893377311.

It can be written as a sum of positive squares in 4 ways, for example, as 494350756 + 643383225 = 22234^2 + 25365^2 .

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 1137733981 - 2³ = 1137733973 is a prime.

It is a super-2 number, since 2×1137733981² = 2588877223044216722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137733921) 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, 32416 + ... + 57673.

It is an arithmetic number, because the mean of its divisors is an integer number (144999855).

Almost surely, 2^1137733981 is an apocalyptic number.

It is an amenable number.

1137733981 is a deficient number, since it is larger than the sum of its proper divisors (22264859).

1137733981 is an equidigital number, since it uses as much as digits as its factorization.

1137733981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90335.

The product of its digits is 95256, while the sum is 43.

The square root of 1137733981 is about 33730.3124948465. The cubic root of 1137733981 is about 1043.9513089376.

The spelling of 1137733981 in words is "one billion, one hundred thirty-seven million, seven hundred thirty-three thousand, nine hundred eighty-one".