180397117 has 2 divisors, whose sum is σ = 180397118. Its totient is φ = 180397116.

The previous prime is 180397103. The next prime is 180397157. The reversal of 180397117 is 711793081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 59814756 = 10981^2 + 7734^2 .

It is a cyclic number.

It is not a de Polignac number, because 180397117 - 2⁷ = 180396989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180397157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90198558 + 90198559.

It is an arithmetic number, because the mean of its divisors is an integer number (90198559).

Almost surely, 2^180397117 is an apocalyptic number.

It is an amenable number.

180397117 is a deficient number, since it is larger than the sum of its proper divisors (1).

180397117 is an equidigital number, since it uses as much as digits as its factorization.

180397117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 37.

The square root of 180397117 is about 13431.1993879921. The cubic root of 180397117 is about 565.0365361290.

The spelling of 180397117 in words is "one hundred eighty million, three hundred ninety-seven thousand, one hundred seventeen".