16719922 has 4 divisors (see below), whose sum is σ = 25079886. Its totient is φ = 8359960.

The previous prime is 16719907. The next prime is 16719947. The reversal of 16719922 is 22991761.

16719922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 4089²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22991761 = 13 ⋅1768597.

It can be written as a sum of positive squares in only one way, i.e., 16719921 + 1 = 4089^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4179979 + ... + 4179982.

Almost surely, 2^16719922 is an apocalyptic number.

16719922 is a deficient number, since it is larger than the sum of its proper divisors (8359964).

16719922 is an equidigital number, since it uses as much as digits as its factorization.

16719922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8359963.

The product of its digits is 13608, while the sum is 37.

The square root of 16719922 is about 4089.0001222793. Note that the first 3 decimals coincide. The cubic root of 16719922 is about 255.7082552924.

The spelling of 16719922 in words is "sixteen million, seven hundred nineteen thousand, nine hundred twenty-two".