16979605 has 4 divisors (see below), whose sum is σ = 20375532. Its totient is φ = 13583680.

The previous prime is 16979603. The next prime is 16979621. The reversal of 16979605 is 50697961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50697961 = 17 ⋅2982233.

It can be written as a sum of positive squares in 2 ways, for example, as 11229201 + 5750404 = 3351^2 + 2398^2 .

It is not a de Polignac number, because 16979605 - 2¹ = 16979603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16979603) 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, 1697956 + ... + 1697965.

It is an arithmetic number, because the mean of its divisors is an integer number (5093883).

Almost surely, 2^16979605 is an apocalyptic number.

It is an amenable number.

16979605 is a deficient number, since it is larger than the sum of its proper divisors (3395927).

16979605 is an equidigital number, since it uses as much as digits as its factorization.

16979605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395926.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 16979605 is about 4120.6316263408. The cubic root of 16979605 is about 257.0252918631.

The spelling of 16979605 in words is "sixteen million, nine hundred seventy-nine thousand, six hundred five".