180900397 has 2 divisors, whose sum is σ = 180900398. Its totient is φ = 180900396.

The previous prime is 180900371. The next prime is 180900413. The reversal of 180900397 is 793009081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121132036 + 59768361 = 11006^2 + 7731^2 .

It is a cyclic number.

It is not a de Polignac number, because 180900397 - 2¹⁵ = 180867629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180900337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90450198 + 90450199.

It is an arithmetic number, because the mean of its divisors is an integer number (90450199).

Almost surely, 2^180900397 is an apocalyptic number.

It is an amenable number.

180900397 is a deficient number, since it is larger than the sum of its proper divisors (1).

180900397 is an equidigital number, since it uses as much as digits as its factorization.

180900397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 180900397 is about 13449.9218213341. The cubic root of 180900397 is about 565.5615030295.

The spelling of 180900397 in words is "one hundred eighty million, nine hundred thousand, three hundred ninety-seven".