180872669 has 4 divisors (see below), whose sum is σ = 181623420. Its totient is φ = 180121920.

The previous prime is 180872651. The next prime is 180872737. The reversal of 180872669 is 966278081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 966278081 = 30307 ⋅31883.

It can be written as a sum of positive squares in 2 ways, for example, as 99241444 + 81631225 = 9962^2 + 9035^2 .

It is a cyclic number.

It is not a de Polignac number, because 180872669 - 2²⁴ = 164095453 is a prime.

It is a super-2 number, since 2×180872669² = 65429844782367122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180872269) 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, 375014 + ... + 375495.

It is an arithmetic number, because the mean of its divisors is an integer number (45405855).

Almost surely, 2^180872669 is an apocalyptic number.

It is an amenable number.

180872669 is a deficient number, since it is larger than the sum of its proper divisors (750751).

180872669 is an equidigital number, since it uses as much as digits as its factorization.

180872669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750750.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 180872669 is about 13448.8909951713. The cubic root of 180872669 is about 565.5326055609.

The spelling of 180872669 in words is "one hundred eighty million, eight hundred seventy-two thousand, six hundred sixty-nine".