1173612131 has 2 divisors, whose sum is σ = 1173612132. Its totient is φ = 1173612130.

The previous prime is 1173612073. The next prime is 1173612149. The reversal of 1173612131 is 1312163711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1173612131 - 2³⁰ = 99870307 is a prime.

It is a super-2 number, since 2×1173612131² = 2754730868060722322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1173612131.

It is not a weakly prime, because it can be changed into another prime (1173612161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586806065 + 586806066.

It is an arithmetic number, because the mean of its divisors is an integer number (586806066).

Almost surely, 2^1173612131 is an apocalyptic number.

1173612131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173612131 is an equidigital number, since it uses as much as digits as its factorization.

1173612131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 26.

The square root of 1173612131 is about 34258.0228705627. The cubic root of 1173612131 is about 1054.8115177312.

Adding to 1173612131 its reverse (1312163711), we get a palindrome (2485775842).

The spelling of 1173612131 in words is "one billion, one hundred seventy-three million, six hundred twelve thousand, one hundred thirty-one".