17220953 has 2 divisors, whose sum is σ = 17220954. Its totient is φ = 17220952.

The previous prime is 17220913. The next prime is 17220967. The reversal of 17220953 is 35902271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9223369 + 7997584 = 3037^2 + 2828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17220953 is a prime.

It is a super-2 number, since 2×17220953² = 593122444456418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17220913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8610476 + 8610477.

It is an arithmetic number, because the mean of its divisors is an integer number (8610477).

Almost surely, 2^17220953 is an apocalyptic number.

It is an amenable number.

17220953 is a deficient number, since it is larger than the sum of its proper divisors (1).

17220953 is an equidigital number, since it uses as much as digits as its factorization.

17220953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 17220953 is about 4149.8136102722. The cubic root of 17220953 is about 258.2373524349.

The spelling of 17220953 in words is "seventeen million, two hundred twenty thousand, nine hundred fifty-three".