180720949 has 2 divisors, whose sum is σ = 180720950. Its totient is φ = 180720948.

The previous prime is 180720923. The next prime is 180720977. The reversal of 180720949 is 949027081.

180720949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175748049 + 4972900 = 13257^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 180720949 - 2⁹ = 180720437 is a prime.

It is a super-2 number, since 2×180720949² = 65320122814921202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180720649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90360474 + 90360475.

It is an arithmetic number, because the mean of its divisors is an integer number (90360475).

Almost surely, 2^180720949 is an apocalyptic number.

It is an amenable number.

180720949 is a deficient number, since it is larger than the sum of its proper divisors (1).

180720949 is an equidigital number, since it uses as much as digits as its factorization.

180720949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 180720949 is about 13443.2491980176. The cubic root of 180720949 is about 565.3744342358.

The spelling of 180720949 in words is "one hundred eighty million, seven hundred twenty thousand, nine hundred forty-nine".