16722857 has 4 divisors (see below), whose sum is σ = 17262336. Its totient is φ = 16183380.

The previous prime is 16722847. The next prime is 16722859. The reversal of 16722857 is 75822761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16722857 - 2¹⁰ = 16721833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16722857.

It is not an unprimeable number, because it can be changed into a prime (16722859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269693 + ... + 269754.

It is an arithmetic number, because the mean of its divisors is an integer number (4315584).

Almost surely, 2^16722857 is an apocalyptic number.

It is an amenable number.

16722857 is a deficient number, since it is larger than the sum of its proper divisors (539479).

16722857 is an equidigital number, since it uses as much as digits as its factorization.

16722857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539478.

The product of its digits is 47040, while the sum is 38.

The square root of 16722857 is about 4089.3589962242. The cubic root of 16722857 is about 255.7232166824.

The spelling of 16722857 in words is "sixteen million, seven hundred twenty-two thousand, eight hundred fifty-seven".