180341921 has 2 divisors, whose sum is σ = 180341922. Its totient is φ = 180341920.

The previous prime is 180341897. The next prime is 180341929. The reversal of 180341921 is 129143081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178489600 + 1852321 = 13360^2 + 1361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180341921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (180341929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90170960 + 90170961.

It is an arithmetic number, because the mean of its divisors is an integer number (90170961).

Almost surely, 2^180341921 is an apocalyptic number.

It is an amenable number.

180341921 is a deficient number, since it is larger than the sum of its proper divisors (1).

180341921 is an equidigital number, since it uses as much as digits as its factorization.

180341921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 180341921 is about 13429.1444626975. The cubic root of 180341921 is about 564.9789022847.

The spelling of 180341921 in words is "one hundred eighty million, three hundred forty-one thousand, nine hundred twenty-one".