180668739 has 16 divisors (see below), whose sum is σ = 254534400. Its totient is φ = 113672736.

The previous prime is 180668731. The next prime is 180668767. The reversal of 180668739 is 937866081.

It is not a de Polignac number, because 180668739 - 2³ = 180668731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180668731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9442 + ... + 21224.

It is an arithmetic number, because the mean of its divisors is an integer number (15908400).

Almost surely, 2^180668739 is an apocalyptic number.

180668739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

180668739 is a deficient number, since it is larger than the sum of its proper divisors (73865661).

180668739 is a wasteful number, since it uses less digits than its factorization.

180668739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12074.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 180668739 is about 13441.3071908948. The cubic root of 180668739 is about 565.3199837282.

The spelling of 180668739 in words is "one hundred eighty million, six hundred sixty-eight thousand, seven hundred thirty-nine".