16717969 has 4 divisors (see below), whose sum is σ = 17169844. Its totient is φ = 16266096.

The previous prime is 16717963. The next prime is 16717991. The reversal of 16717969 is 96971761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96971761 = 61 ⋅1589701.

It can be written as a sum of positive squares in 2 ways, for example, as 15249025 + 1468944 = 3905^2 + 1212^2 .

It is a cyclic number.

It is not a de Polignac number, because 16717969 - 2⁹ = 16717457 is a prime.

It is a super-2 number, since 2×16717969² = 558980974969922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16717963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225882 + ... + 225955.

It is an arithmetic number, because the mean of its divisors is an integer number (4292461).

Almost surely, 2^16717969 is an apocalyptic number.

It is an amenable number.

16717969 is a deficient number, since it is larger than the sum of its proper divisors (451875).

16717969 is an equidigital number, since it uses as much as digits as its factorization.

16717969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451874.

The product of its digits is 142884, while the sum is 46.

The square root of 16717969 is about 4088.7613038670. The cubic root of 16717969 is about 255.6982987534.

The spelling of 16717969 in words is "sixteen million, seven hundred seventeen thousand, nine hundred sixty-nine".