18379469 has 2 divisors, whose sum is σ = 18379470. Its totient is φ = 18379468.

The previous prime is 18379453. The next prime is 18379523. The reversal of 18379469 is 96497381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 316969 = 4250^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 18379469 - 2⁴ = 18379453 is a prime.

It is a super-2 number, since 2×18379469² = 675609761443922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11379469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189734 + 9189735.

It is an arithmetic number, because the mean of its divisors is an integer number (9189735).

Almost surely, 2^18379469 is an apocalyptic number.

It is an amenable number.

18379469 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379469 is an equidigital number, since it uses as much as digits as its factorization.

18379469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 18379469 is about 4287.1282929252. The cubic root of 18379469 is about 263.9029956206.

The spelling of 18379469 in words is "eighteen million, three hundred seventy-nine thousand, four hundred sixty-nine".