180672181 has 2 divisors, whose sum is σ = 180672182. Its totient is φ = 180672180.

The previous prime is 180672139. The next prime is 180672211. The reversal of 180672181 is 181276081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157101156 + 23571025 = 12534^2 + 4855^2 .

It is a cyclic number.

It is not a de Polignac number, because 180672181 - 2⁷ = 180672053 is a prime.

It is a super-2 number, since 2×180672181² = 65284873974593522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180670181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90336090 + 90336091.

It is an arithmetic number, because the mean of its divisors is an integer number (90336091).

Almost surely, 2^180672181 is an apocalyptic number.

It is an amenable number.

180672181 is a deficient number, since it is larger than the sum of its proper divisors (1).

180672181 is an equidigital number, since it uses as much as digits as its factorization.

180672181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 180672181 is about 13441.4352284271. The cubic root of 180672181 is about 565.3235737590.

The spelling of 180672181 in words is "one hundred eighty million, six hundred seventy-two thousand, one hundred eighty-one".