180709849 has 2 divisors, whose sum is σ = 180709850. Its totient is φ = 180709848.

The previous prime is 180709843. The next prime is 180709883. The reversal of 180709849 is 948907081.

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., 105575625 + 75134224 = 10275^2 + 8668^2 .

It is a cyclic number.

It is not a de Polignac number, because 180709849 - 2⁷ = 180709721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180709799 and 180709808.

It is not a weakly prime, because it can be changed into another prime (180709843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90354924 + 90354925.

It is an arithmetic number, because the mean of its divisors is an integer number (90354925).

Almost surely, 2^180709849 is an apocalyptic number.

It is an amenable number.

180709849 is a deficient number, since it is larger than the sum of its proper divisors (1).

180709849 is an equidigital number, since it uses as much as digits as its factorization.

180709849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 180709849 is about 13442.8363450575. The cubic root of 180709849 is about 565.3628587752.

The spelling of 180709849 in words is "one hundred eighty million, seven hundred nine thousand, eight hundred forty-nine".