180720823 has 2 divisors, whose sum is σ = 180720824. Its totient is φ = 180720822.

The previous prime is 180720809. The next prime is 180720847. The reversal of 180720823 is 328027081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 180720823 - 2⁵ = 180720791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180720803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90360411 + 90360412.

It is an arithmetic number, because the mean of its divisors is an integer number (90360412).

Almost surely, 2^180720823 is an apocalyptic number.

180720823 is a deficient number, since it is larger than the sum of its proper divisors (1).

180720823 is an equidigital number, since it uses as much as digits as its factorization.

180720823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 180720823 is about 13443.2445116497. The cubic root of 180720823 is about 565.3743028414.

The spelling of 180720823 in words is "one hundred eighty million, seven hundred twenty thousand, eight hundred twenty-three".