16979399 has 4 divisors (see below), whose sum is σ = 16990680. Its totient is φ = 16968120.

The previous prime is 16979387. The next prime is 16979401. The reversal of 16979399 is 99397961.

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: 99397961 = 13 ⋅7645997.

It is a cyclic number.

It is not a de Polignac number, because 16979399 - 2⁴ = 16979383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16979399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16979309) 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 3 ways as a sum of consecutive naturals, for example, 2957 + ... + 6534.

It is an arithmetic number, because the mean of its divisors is an integer number (4247670).

Almost surely, 2^16979399 is an apocalyptic number.

16979399 is a deficient number, since it is larger than the sum of its proper divisors (11281).

16979399 is an equidigital number, since it uses as much as digits as its factorization.

16979399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11280.

The product of its digits is 826686, while the sum is 53.

The square root of 16979399 is about 4120.6066300971. The cubic root of 16979399 is about 257.0242524313.

The spelling of 16979399 in words is "sixteen million, nine hundred seventy-nine thousand, three hundred ninety-nine".