16722847 has 2 divisors, whose sum is σ = 16722848. Its totient is φ = 16722846.

The previous prime is 16722791. The next prime is 16722859. The reversal of 16722847 is 74822761.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16722847 is a prime.

It is a super-2 number, since 2×16722847² = 559307223570818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16722347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361423 + 8361424.

It is an arithmetic number, because the mean of its divisors is an integer number (8361424).

Almost surely, 2^16722847 is an apocalyptic number.

16722847 is a deficient number, since it is larger than the sum of its proper divisors (1).

16722847 is an equidigital number, since it uses as much as digits as its factorization.

16722847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 16722847 is about 4089.3577735385. The cubic root of 16722847 is about 255.7231657096.

The spelling of 16722847 in words is "sixteen million, seven hundred twenty-two thousand, eight hundred forty-seven".