16720279 has 2 divisors, whose sum is σ = 16720280. Its totient is φ = 16720278.

The previous prime is 16720243. The next prime is 16720289. The reversal of 16720279 is 97202761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16720279 - 2¹¹ = 16718231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16720289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360139 + 8360140.

It is an arithmetic number, because the mean of its divisors is an integer number (8360140).

Almost surely, 2^16720279 is an apocalyptic number.

16720279 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720279 is an equidigital number, since it uses as much as digits as its factorization.

16720279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 16720279 is about 4089.0437757500. The cubic root of 16720279 is about 255.7100752211.

It can be divided in two parts, 167202 and 79, that added together give a square (167281 = 409²).

The spelling of 16720279 in words is "sixteen million, seven hundred twenty thousand, two hundred seventy-nine".