180894109 has 4 divisors (see below), whose sum is σ = 197339040. Its totient is φ = 164449180.

The previous prime is 180894107. The next prime is 180894137. The reversal of 180894109 is 901498081.

180894109 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.

It is a cyclic number.

It is not a de Polignac number, because 180894109 - 2¹ = 180894107 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180894107) 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, 8222449 + ... + 8222470.

It is an arithmetic number, because the mean of its divisors is an integer number (49334760).

Almost surely, 2^180894109 is an apocalyptic number.

It is an amenable number.

180894109 is a deficient number, since it is larger than the sum of its proper divisors (16444931).

180894109 is a wasteful number, since it uses less digits than its factorization.

180894109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16444930.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 180894109 is about 13449.6880632972. The cubic root of 180894109 is about 565.5549500829.

The spelling of 180894109 in words is "one hundred eighty million, eight hundred ninety-four thousand, one hundred nine".