17420279 has 2 divisors, whose sum is σ = 17420280. Its totient is φ = 17420278.

The previous prime is 17420267. The next prime is 17420297. The reversal of 17420279 is 97202471.

Together with next prime (17420297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (97202471) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17420279 is a prime.

It is a super-2 number, since 2×17420279² = 606932240875682, which contains 22 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 (17423279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8710139 + 8710140.

It is an arithmetic number, because the mean of its divisors is an integer number (8710140).

Almost surely, 2^17420279 is an apocalyptic number.

17420279 is a deficient number, since it is larger than the sum of its proper divisors (1).

17420279 is an equidigital number, since it uses as much as digits as its factorization.

17420279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 17420279 is about 4173.7607741700. The cubic root of 17420279 is about 259.2298660446.

The spelling of 17420279 in words is "seventeen million, four hundred twenty thousand, two hundred seventy-nine".