17421497 has 2 divisors, whose sum is σ = 17421498. Its totient is φ = 17421496.

The previous prime is 17421449. The next prime is 17421517. The reversal of 17421497 is 79412471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 1771561 = 3956^2 + 1331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17421497 is a prime.

It is not a weakly prime, because it can be changed into another prime (17420497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8710748 + 8710749.

It is an arithmetic number, because the mean of its divisors is an integer number (8710749).

Almost surely, 2^17421497 is an apocalyptic number.

It is an amenable number.

17421497 is a deficient number, since it is larger than the sum of its proper divisors (1).

17421497 is an equidigital number, since it uses as much as digits as its factorization.

17421497 is an evil number, because the sum of its binary digits is even.

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

The square root of 17421497 is about 4173.9066831926. The cubic root of 17421497 is about 259.2359075594.

The spelling of 17421497 in words is "seventeen million, four hundred twenty-one thousand, four hundred ninety-seven".