18969679 has 2 divisors, whose sum is σ = 18969680. Its totient is φ = 18969678.

The previous prime is 18969653. The next prime is 18969701. The reversal of 18969679 is 97696981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18969679 - 2⁵ = 18969647 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 (18969479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484839 + 9484840.

It is an arithmetic number, because the mean of its divisors is an integer number (9484840).

Almost surely, 2^18969679 is an apocalyptic number.

18969679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18969679 is an equidigital number, since it uses as much as digits as its factorization.

18969679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 18969679 is about 4355.4194975915. The cubic root of 18969679 is about 266.6981443745.

The spelling of 18969679 in words is "eighteen million, nine hundred sixty-nine thousand, six hundred seventy-nine".