18379943 has 2 divisors, whose sum is σ = 18379944. Its totient is φ = 18379942.

The previous prime is 18379927. The next prime is 18379957. The reversal of 18379943 is 34997381.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18379943 - 2⁴ = 18379927 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18379894 and 18379903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18379913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189971 + 9189972.

It is an arithmetic number, because the mean of its divisors is an integer number (9189972).

Almost surely, 2^18379943 is an apocalyptic number.

18379943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379943 is an equidigital number, since it uses as much as digits as its factorization.

18379943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 18379943 is about 4287.1835743294. The cubic root of 18379943 is about 263.9052642560.

The spelling of 18379943 in words is "eighteen million, three hundred seventy-nine thousand, nine hundred forty-three".