180794869 has 2 divisors, whose sum is σ = 180794870. Its totient is φ = 180794868.

The previous prime is 180794863. The next prime is 180794893. The reversal of 180794869 is 968497081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138062500 + 42732369 = 11750^2 + 6537^2 .

It is a cyclic number.

It is not a de Polignac number, because 180794869 - 2⁵ = 180794837 is a prime.

It is a super-2 number, since 2×180794869² = 65373569313454322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180794863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90397434 + 90397435.

It is an arithmetic number, because the mean of its divisors is an integer number (90397435).

Almost surely, 2^180794869 is an apocalyptic number.

It is an amenable number.

180794869 is a deficient number, since it is larger than the sum of its proper divisors (1).

180794869 is an equidigital number, since it uses as much as digits as its factorization.

180794869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 180794869 is about 13445.9982522682. The cubic root of 180794869 is about 565.4515084611.

The spelling of 180794869 in words is "one hundred eighty million, seven hundred ninety-four thousand, eight hundred sixty-nine".