180142309 has 4 divisors (see below), whose sum is σ = 180173920. Its totient is φ = 180110700.

The previous prime is 180142301. The next prime is 180142321. The reversal of 180142309 is 903241081.

It is a happy number.

180142309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 903241081 = 101 ⋅8942981.

It is a cyclic number.

It is not a de Polignac number, because 180142309 - 2³ = 180142301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180142301) 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, 4617 + ... + 19534.

It is an arithmetic number, because the mean of its divisors is an integer number (45043480).

Almost surely, 2^180142309 is an apocalyptic number.

It is an amenable number.

180142309 is a deficient number, since it is larger than the sum of its proper divisors (31611).

180142309 is an equidigital number, since it uses as much as digits as its factorization.

180142309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31610.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 180142309 is about 13421.7103604570. The cubic root of 180142309 is about 564.7703757949.

The spelling of 180142309 in words is "one hundred eighty million, one hundred forty-two thousand, three hundred nine".