16872779 has 24 divisors (see below), whose sum is σ = 22238208. Its totient is φ = 12435120.

The previous prime is 16872767. The next prime is 16872781. The reversal of 16872779 is 97727861.

It is not a de Polignac number, because 16872779 - 2⁴ = 16872763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16872379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27494 + ... + 28100.

It is an arithmetic number, because the mean of its divisors is an integer number (926592).

Almost surely, 2^16872779 is an apocalyptic number.

16872779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16872779 is a deficient number, since it is larger than the sum of its proper divisors (5365429).

16872779 is a wasteful number, since it uses less digits than its factorization.

16872779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 644 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 16872779 is about 4107.6488408821. The cubic root of 16872779 is about 256.4851385994.

The spelling of 16872779 in words is "sixteen million, eight hundred seventy-two thousand, seven hundred seventy-nine".