623172493 has 2 divisors, whose sum is σ = 623172494. Its totient is φ = 623172492.

The previous prime is 623172443. The next prime is 623172527. The reversal of 623172493 is 394271326.

623172493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595262404 + 27910089 = 24398^2 + 5283^2 .

It is a cyclic number.

It is not a de Polignac number, because 623172493 - 2²¹ = 621075341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623172413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311586246 + 311586247.

It is an arithmetic number, because the mean of its divisors is an integer number (311586247).

Almost surely, 2^623172493 is an apocalyptic number.

It is an amenable number.

623172493 is a deficient number, since it is larger than the sum of its proper divisors (1).

623172493 is an equidigital number, since it uses as much as digits as its factorization.

623172493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 623172493 is about 24963.4231026115. The cubic root of 623172493 is about 854.1538283229.

The spelling of 623172493 in words is "six hundred twenty-three million, one hundred seventy-two thousand, four hundred ninety-three".