18149279 has 2 divisors, whose sum is σ = 18149280. Its totient is φ = 18149278.

The previous prime is 18149249. The next prime is 18149293. The reversal of 18149279 is 97294181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18149279 - 2⁸ = 18149023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18149239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9074639 + 9074640.

It is an arithmetic number, because the mean of its divisors is an integer number (9074640).

Almost surely, 2^18149279 is an apocalyptic number.

18149279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18149279 is an equidigital number, since it uses as much as digits as its factorization.

18149279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 18149279 is about 4260.1970611698. The cubic root of 18149279 is about 262.7966303594.

The spelling of 18149279 in words is "eighteen million, one hundred forty-nine thousand, two hundred seventy-nine".