180787361 has 4 divisors (see below), whose sum is σ = 181252500. Its totient is φ = 180322224.

The previous prime is 180787349. The next prime is 180787393. The reversal of 180787361 is 163787081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163787081 = 181 ⋅904901.

It can be written as a sum of positive squares in 2 ways, for example, as 40246336 + 140541025 = 6344^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 180787361 - 2¹⁸ = 180525217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180787331) 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, 231986 + ... + 232763.

It is an arithmetic number, because the mean of its divisors is an integer number (45313125).

Almost surely, 2^180787361 is an apocalyptic number.

It is an amenable number.

180787361 is a deficient number, since it is larger than the sum of its proper divisors (465139).

180787361 is an equidigital number, since it uses as much as digits as its factorization.

180787361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465138.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 180787361 is about 13445.7190584959. The cubic root of 180787361 is about 565.4436810474.

The spelling of 180787361 in words is "one hundred eighty million, seven hundred eighty-seven thousand, three hundred sixty-one".