1165770131 has 2 divisors, whose sum is σ = 1165770132. Its totient is φ = 1165770130.

The previous prime is 1165770113. The next prime is 1165770161. The reversal of 1165770131 is 1310775611.

Together with previous prime (1165770113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165770131 is a prime.

It is a super-2 number, since 2×1165770131² = 2718039996663514322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1165770161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582885065 + 582885066.

It is an arithmetic number, because the mean of its divisors is an integer number (582885066).

Almost surely, 2^1165770131 is an apocalyptic number.

1165770131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165770131 is an equidigital number, since it uses as much as digits as its factorization.

1165770131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 1165770131 is about 34143.3760925893. The cubic root of 1165770131 is about 1052.4568713791.

The spelling of 1165770131 in words is "one billion, one hundred sixty-five million, seven hundred seventy thousand, one hundred thirty-one".