16979867 has 4 divisors (see below), whose sum is σ = 16988496. Its totient is φ = 16971240.

The previous prime is 16979861. The next prime is 16979869. The reversal of 16979867 is 76897961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 76897961 = 7 ⋅10985423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16979867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16979861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 5832.

It is an arithmetic number, because the mean of its divisors is an integer number (4247124).

Almost surely, 2^16979867 is an apocalyptic number.

16979867 is a deficient number, since it is larger than the sum of its proper divisors (8629).

16979867 is an equidigital number, since it uses as much as digits as its factorization.

16979867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628.

The product of its digits is 1143072, while the sum is 53.

The square root of 16979867 is about 4120.6634174608. The cubic root of 16979867 is about 257.0266138467.

The spelling of 16979867 in words is "sixteen million, nine hundred seventy-nine thousand, eight hundred sixty-seven".