17421479 has 4 divisors (see below), whose sum is σ = 17558784. Its totient is φ = 17284176.

The previous prime is 17421449. The next prime is 17421497. The reversal of 17421479 is 97412471.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17421479 - 2¹² = 17417383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17421449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68462 + ... + 68715.

It is an arithmetic number, because the mean of its divisors is an integer number (4389696).

Almost surely, 2^17421479 is an apocalyptic number.

17421479 is a deficient number, since it is larger than the sum of its proper divisors (137305).

17421479 is a wasteful number, since it uses less digits than its factorization.

17421479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137304.

The product of its digits is 14112, while the sum is 35.

The square root of 17421479 is about 4173.9045269388. The cubic root of 17421479 is about 259.2358182780.

The spelling of 17421479 in words is "seventeen million, four hundred twenty-one thousand, four hundred seventy-nine".