1316751761 has 4 divisors (see below), whose sum is σ = 1418040372. Its totient is φ = 1215463152.

The previous prime is 1316751749. The next prime is 1316751763. The reversal of 1316751761 is 1671576131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1671576131 = 1231 ⋅1357901.

It can be written as a sum of positive squares in 2 ways, for example, as 775956736 + 540795025 = 27856^2 + 23255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316751761 - 2²² = 1312557457 is a prime.

It is a super-2 number, since 2×1316751761² = 3467670400193202242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316751763) 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, 50644286 + ... + 50644311.

It is an arithmetic number, because the mean of its divisors is an integer number (354510093).

Almost surely, 2^1316751761 is an apocalyptic number.

It is an amenable number.

1316751761 is a deficient number, since it is larger than the sum of its proper divisors (101288611).

1316751761 is a wasteful number, since it uses less digits than its factorization.

1316751761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101288610.

The product of its digits is 26460, while the sum is 38.

The square root of 1316751761 is about 36287.0742965040. The cubic root of 1316751761 is about 1096.0607753185.

The spelling of 1316751761 in words is "one billion, three hundred sixteen million, seven hundred fifty-one thousand, seven hundred sixty-one".