1165396231 has 2 divisors, whose sum is σ = 1165396232. Its totient is φ = 1165396230.

The previous prime is 1165396187. The next prime is 1165396247. The reversal of 1165396231 is 1326935611.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1326935611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165396231 - 2¹⁷ = 1165265159 is a prime.

It is a super-2 number, since 2×1165396231² = 2716296750458010722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165396031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582698115 + 582698116.

It is an arithmetic number, because the mean of its divisors is an integer number (582698116).

Almost surely, 2^1165396231 is an apocalyptic number.

1165396231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165396231 is an equidigital number, since it uses as much as digits as its factorization.

1165396231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 1165396231 is about 34137.9002136921. The cubic root of 1165396231 is about 1052.3443404172.

The spelling of 1165396231 in words is "one billion, one hundred sixty-five million, three hundred ninety-six thousand, two hundred thirty-one".