1311662137 has 4 divisors (see below), whose sum is σ = 1311736356. Its totient is φ = 1311587920.

The previous prime is 1311662129. The next prime is 1311662159. The reversal of 1311662137 is 7312661131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1266221056 + 45441081 = 35584^2 + 6741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311662137 - 2³ = 1311662129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311662099 and 1311662108.

It is not an unprimeable number, because it can be changed into a prime (1311662117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6423 + ... + 51619.

It is an arithmetic number, because the mean of its divisors is an integer number (327934089).

Almost surely, 2^1311662137 is an apocalyptic number.

It is an amenable number.

1311662137 is a deficient number, since it is larger than the sum of its proper divisors (74219).

1311662137 is an equidigital number, since it uses as much as digits as its factorization.

1311662137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74218.

The product of its digits is 4536, while the sum is 31.

The square root of 1311662137 is about 36216.8764114190. The cubic root of 1311662137 is about 1094.6467552486.

The spelling of 1311662137 in words is "one billion, three hundred eleven million, six hundred sixty-two thousand, one hundred thirty-seven".