18459479 has 2 divisors, whose sum is σ = 18459480. Its totient is φ = 18459478.

The previous prime is 18459473. The next prime is 18459487. The reversal of 18459479 is 97495481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18459479 - 2²⁰ = 17410903 is a prime.

It is a super-3 number, since 3×18459479³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18459473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9229739 + 9229740.

It is an arithmetic number, because the mean of its divisors is an integer number (9229740).

Almost surely, 2^18459479 is an apocalyptic number.

18459479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18459479 is an equidigital number, since it uses as much as digits as its factorization.

18459479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 18459479 is about 4296.4495807585. The cubic root of 18459479 is about 264.2853844930.

The spelling of 18459479 in words is "eighteen million, four hundred fifty-nine thousand, four hundred seventy-nine".