16969457 has 4 divisors (see below), whose sum is σ = 16990116. Its totient is φ = 16948800.

The previous prime is 16969429. The next prime is 16969481. The reversal of 16969457 is 75496961.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 10699441 = 2504^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 16969457 - 2⁸ = 16969201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16939457) 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, 9044 + ... + 10757.

It is an arithmetic number, because the mean of its divisors is an integer number (4247529).

Almost surely, 2^16969457 is an apocalyptic number.

It is an amenable number.

16969457 is a deficient number, since it is larger than the sum of its proper divisors (20659).

16969457 is an equidigital number, since it uses as much as digits as its factorization.

16969457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20658.

The product of its digits is 408240, while the sum is 47.

The square root of 16969457 is about 4119.4000776812. The cubic root of 16969457 is about 256.9740772352.

The spelling of 16969457 in words is "sixteen million, nine hundred sixty-nine thousand, four hundred fifty-seven".