1161943723 has 4 divisors (see below), whose sum is σ = 1162191240. Its totient is φ = 1161696208.

The previous prime is 1161943703. The next prime is 1161943733. The reversal of 1161943723 is 3273491611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3273491611 = 13 ⋅251807047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161943723 is a prime.

It is a super-2 number, since 2×1161943723² = 2700226430838201458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161943703) 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, 116578 + ... + 126151.

It is an arithmetic number, because the mean of its divisors is an integer number (290547810).

Almost surely, 2^1161943723 is an apocalyptic number.

1161943723 is a deficient number, since it is larger than the sum of its proper divisors (247517).

1161943723 is an equidigital number, since it uses as much as digits as its factorization.

1161943723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247516.

The product of its digits is 27216, while the sum is 37.

The square root of 1161943723 is about 34087.2956246165. The cubic root of 1161943723 is about 1051.3041159544.

The spelling of 1161943723 in words is "one billion, one hundred sixty-one million, nine hundred forty-three thousand, seven hundred twenty-three".