180623813 has 4 divisors (see below), whose sum is σ = 180730368. Its totient is φ = 180517260.

The previous prime is 180623801. The next prime is 180623843. The reversal of 180623813 is 318326081.

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 180623813 - 2⁶ = 180623749 is a prime.

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 180623813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180623843) 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, 50693 + ... + 54138.

It is an arithmetic number, because the mean of its divisors is an integer number (45182592).

Almost surely, 2^180623813 is an apocalyptic number.

It is an amenable number.

180623813 is a deficient number, since it is larger than the sum of its proper divisors (106555).

180623813 is a wasteful number, since it uses less digits than its factorization.

180623813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106554.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 180623813 is about 13439.6358953656. The cubic root of 180623813 is about 565.2731214040.

Adding to 180623813 its reverse (318326081), we get a palindrome (498949894).

The spelling of 180623813 in words is "one hundred eighty million, six hundred twenty-three thousand, eight hundred thirteen".