1323577161 has 27 divisors (see below), whose sum is σ = 1951576263. Its totient is φ = 864412560.

The previous prime is 1323577127. The next prime is 1323577163. The reversal of 1323577161 is 1617753231.

The square root of 1323577161 is 36381.

It is a perfect power (a square), and thus also a powerful number.

1323577161 is a `hidden beast` number, since 1 + 3 + 23 + 577 + 1 + 61 = 666.

1323577161 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 14584761 + 1308992400 = 3819^2 + 36180^2 .

It is not a de Polignac number, because 1323577161 - 2⁹ = 1323576649 is a prime.

It is a super-2 number, since 2×1323577161² = 3503713002241639842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1323577163) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7312491 + ... + 7312671.

Almost surely, 2^1323577161 is an apocalyptic number.

1323577161 is the 36381-st square number.

1323577161 is the 18191-st centered octagonal number.

It is an amenable number.

1323577161 is a deficient number, since it is larger than the sum of its proper divisors (627999102).

1323577161 is an frugal number, since it uses more digits than its factorization.

1323577161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 251 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The cubic root of 1323577161 is about 1097.9513276324.

Multiplying 1323577161 by its sum of digits (36), we get a square (47648777796 = 218286²).

The spelling of 1323577161 in words is "one billion, three hundred twenty-three million, five hundred seventy-seven thousand, one hundred sixty-one".