180616969 has 4 divisors (see below), whose sum is σ = 194510596. Its totient is φ = 166723344.

The previous prime is 180616957. The next prime is 180616973. The reversal of 180616969 is 969616081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969616081 = 7 ⋅138516583.

It can be written as a sum of positive squares in 2 ways, for example, as 14722569 + 165894400 = 3837^2 + 12880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180616969 is a prime.

It is a super-2 number, since 2×180616969² = 65244978981493922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180616369) 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, 6946794 + ... + 6946819.

It is an arithmetic number, because the mean of its divisors is an integer number (48627649).

Almost surely, 2^180616969 is an apocalyptic number.

It is an amenable number.

180616969 is a deficient number, since it is larger than the sum of its proper divisors (13893627).

180616969 is a wasteful number, since it uses less digits than its factorization.

180616969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13893626.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 180616969 is about 13439.3812729604. The cubic root of 180616969 is about 565.2659817435.

The spelling of 180616969 in words is "one hundred eighty million, six hundred sixteen thousand, nine hundred sixty-nine".