180309377 has 4 divisors (see below), whose sum is σ = 180617136. Its totient is φ = 180001620.

The previous prime is 180309329. The next prime is 180309379. The reversal of 180309377 is 773903081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 180309377 - 2⁶ = 180309313 is a prime.

It is a super-2 number, since 2×180309377² = 65022942868256258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 180309377.

It is not an unprimeable number, because it can be changed into a prime (180309379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152999 + ... + 154172.

It is an arithmetic number, because the mean of its divisors is an integer number (45154284).

Almost surely, 2^180309377 is an apocalyptic number.

It is an amenable number.

180309377 is a deficient number, since it is larger than the sum of its proper divisors (307759).

180309377 is an equidigital number, since it uses as much as digits as its factorization.

180309377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307758.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 180309377 is about 13427.9327150533. The cubic root of 180309377 is about 564.9449154014.

The spelling of 180309377 in words is "one hundred eighty million, three hundred nine thousand, three hundred seventy-seven".