18379147 has 2 divisors, whose sum is σ = 18379148. Its totient is φ = 18379146.

The previous prime is 18379079. The next prime is 18379171. The reversal of 18379147 is 74197381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18379147 - 2¹⁵ = 18346379 is a prime.

It is not a weakly prime, because it can be changed into another prime (18379177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189573 + 9189574.

It is an arithmetic number, because the mean of its divisors is an integer number (9189574).

Almost surely, 2^18379147 is an apocalyptic number.

18379147 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379147 is an equidigital number, since it uses as much as digits as its factorization.

18379147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 18379147 is about 4287.0907384845. The cubic root of 18379147 is about 263.9014544578.

The spelling of 18379147 in words is "eighteen million, three hundred seventy-nine thousand, one hundred forty-seven".