1165673231 has 4 divisors (see below), whose sum is σ = 1171590552. Its totient is φ = 1159755912.

The previous prime is 1165673213. The next prime is 1165673233. The reversal of 1165673231 is 1323765611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1165673231 - 2¹⁸ = 1165411087 is a prime.

It is a super-2 number, since 2×1165673231² = 2717588162939958722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1165673191 and 1165673200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165673233) 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, 2958365 + ... + 2958758.

It is an arithmetic number, because the mean of its divisors is an integer number (292897638).

Almost surely, 2^1165673231 is an apocalyptic number.

1165673231 is a deficient number, since it is larger than the sum of its proper divisors (5917321).

1165673231 is an equidigital number, since it uses as much as digits as its factorization.

1165673231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5917320.

The product of its digits is 22680, while the sum is 35.

The square root of 1165673231 is about 34141.9570470118. The cubic root of 1165673231 is about 1052.4277101423.

The spelling of 1165673231 in words is "one billion, one hundred sixty-five million, six hundred seventy-three thousand, two hundred thirty-one".