16949779 has 16 divisors (see below), whose sum is σ = 21240576. Its totient is φ = 13140000.

The previous prime is 16949773. The next prime is 16949789. The reversal of 16949779 is 97794961.

It is a cyclic number.

It is not a de Polignac number, because 16949779 - 2¹⁷ = 16818707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16949773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18889 + ... + 19765.

It is an arithmetic number, because the mean of its divisors is an integer number (1327536).

Almost surely, 2^16949779 is an apocalyptic number.

16949779 is a deficient number, since it is larger than the sum of its proper divisors (4290797).

16949779 is a wasteful number, since it uses less digits than its factorization.

16949779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its digits is 857304, while the sum is 52.

The square root of 16949779 is about 4117.0109302745. The cubic root of 16949779 is about 256.8747086702.

The spelling of 16949779 in words is "sixteen million, nine hundred forty-nine thousand, seven hundred seventy-nine".