18499379 has 2 divisors, whose sum is σ = 18499380. Its totient is φ = 18499378.

The previous prime is 18499373. The next prime is 18499421. The reversal of 18499379 is 97399481.

It is a weak prime.

It is an emirp because it is prime and its reverse (97399481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18499379 - 2⁴ = 18499363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18499373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9249689 + 9249690.

It is an arithmetic number, because the mean of its divisors is an integer number (9249690).

Almost surely, 2^18499379 is an apocalyptic number.

18499379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18499379 is an equidigital number, since it uses as much as digits as its factorization.

18499379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 18499379 is about 4301.0904431318. The cubic root of 18499379 is about 264.4756643002.

The spelling of 18499379 in words is "eighteen million, four hundred ninety-nine thousand, three hundred seventy-nine".