18706879 has 2 divisors, whose sum is σ = 18706880. Its totient is φ = 18706878.

The previous prime is 18706873. The next prime is 18706901. The reversal of 18706879 is 97860781.

It is a weak prime.

It is an emirp because it is prime and its reverse (97860781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18706879 - 2⁵ = 18706847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18706873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9353439 + 9353440.

It is an arithmetic number, because the mean of its divisors is an integer number (9353440).

Almost surely, 2^18706879 is an apocalyptic number.

18706879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18706879 is an equidigital number, since it uses as much as digits as its factorization.

18706879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18706879 is about 4325.1449686687. The cubic root of 18706879 is about 265.4608286390.

The spelling of 18706879 in words is "eighteen million, seven hundred six thousand, eight hundred seventy-nine".