16779172 has 6 divisors (see below), whose sum is σ = 29363558. Its totient is φ = 8389584.

The previous prime is 16779163. The next prime is 16779173. The reversal of 16779172 is 27197761.

It can be written as a sum of positive squares in only one way, i.e., 13660416 + 3118756 = 3696^2 + 1766^2 .

It is a super-2 number, since 2×16779172² = 563081226011168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16779173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097393 + ... + 2097400.

Almost surely, 2^16779172 is an apocalyptic number.

It is an amenable number.

16779172 is a deficient number, since it is larger than the sum of its proper divisors (12584386).

16779172 is a wasteful number, since it uses less digits than its factorization.

16779172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194797 (or 4194795 counting only the distinct ones).

The product of its digits is 37044, while the sum is 40.

The square root of 16779172 is about 4096.2387625723. The cubic root of 16779172 is about 256.0099483439.

The spelling of 16779172 in words is "sixteen million, seven hundred seventy-nine thousand, one hundred seventy-two".