1823138725 has 24 divisors (see below), whose sum is σ = 2322619200. Its totient is φ = 1418833920.

The previous prime is 1823138693. The next prime is 1823138729. The reversal of 1823138725 is 5278313281.

It is a happy number.

It is not a de Polignac number, because 1823138725 - 2⁵ = 1823138693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1823138729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272976 + ... + 279574.

It is an arithmetic number, because the mean of its divisors is an integer number (96775800).

Almost surely, 2^1823138725 is an apocalyptic number.

It is an amenable number.

1823138725 is a deficient number, since it is larger than the sum of its proper divisors (499480475).

1823138725 is a wasteful number, since it uses less digits than its factorization.

1823138725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6909 (or 6904 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 1823138725 is about 42698.2285932332. The cubic root of 1823138725 is about 1221.6306076232.

The spelling of 1823138725 in words is "one billion, eight hundred twenty-three million, one hundred thirty-eight thousand, seven hundred twenty-five".