18461279 has 2 divisors, whose sum is σ = 18461280. Its totient is φ = 18461278.

The previous prime is 18461263. The next prime is 18461291. The reversal of 18461279 is 97216481.

It is a strong prime.

It is an emirp because it is prime and its reverse (97216481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18461279 - 2⁴ = 18461263 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 (18461239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9230639 + 9230640.

It is an arithmetic number, because the mean of its divisors is an integer number (9230640).

Almost surely, 2^18461279 is an apocalyptic number.

18461279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18461279 is an equidigital number, since it uses as much as digits as its factorization.

18461279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 18461279 is about 4296.6590509371. The cubic root of 18461279 is about 264.2939744470.

It can be divided in two parts, 1846 and 1279, that added together give a 5-th power (3125 = 5⁵).

The spelling of 18461279 in words is "eighteen million, four hundred sixty-one thousand, two hundred seventy-nine".