18679229 has 2 divisors, whose sum is σ = 18679230. Its totient is φ = 18679228.

The previous prime is 18679207. The next prime is 18679249. The reversal of 18679229 is 92297681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15031129 + 3648100 = 3877^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 18679229 - 2⁸ = 18678973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18679229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18679249) 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, 9339614 + 9339615.

It is an arithmetic number, because the mean of its divisors is an integer number (9339615).

Almost surely, 2^18679229 is an apocalyptic number.

It is an amenable number.

18679229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18679229 is an equidigital number, since it uses as much as digits as its factorization.

18679229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 18679229 is about 4321.9473620117. The cubic root of 18679229 is about 265.3299746144.

The spelling of 18679229 in words is "eighteen million, six hundred seventy-nine thousand, two hundred twenty-nine".