18625879 has 2 divisors, whose sum is σ = 18625880. Its totient is φ = 18625878.

The previous prime is 18625853. The next prime is 18625889. The reversal of 18625879 is 97852681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18625879 - 2⁹ = 18625367 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18625819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9312939 + 9312940.

It is an arithmetic number, because the mean of its divisors is an integer number (9312940).

Almost surely, 2^18625879 is an apocalyptic number.

18625879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18625879 is an equidigital number, since it uses as much as digits as its factorization.

18625879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 18625879 is about 4315.7709624122. The cubic root of 18625879 is about 265.0771295603.

The spelling of 18625879 in words is "eighteen million, six hundred twenty-five thousand, eight hundred seventy-nine".