16840679 has 4 divisors (see below), whose sum is σ = 16904976. Its totient is φ = 16776384.

The previous prime is 16840633. The next prime is 16840721. The reversal of 16840679 is 97604861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97604861 = 443 ⋅220327.

It is a cyclic number.

It is not a de Polignac number, because 16840679 - 2²⁰ = 15792103 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 (16830679) 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, 31754 + ... + 32279.

It is an arithmetic number, because the mean of its divisors is an integer number (4226244).

Almost surely, 2^16840679 is an apocalyptic number.

16840679 is a deficient number, since it is larger than the sum of its proper divisors (64297).

16840679 is an equidigital number, since it uses as much as digits as its factorization.

16840679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64296.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 16840679 is about 4103.7396359906. The cubic root of 16840679 is about 256.3223833591.

The spelling of 16840679 in words is "sixteen million, eight hundred forty thousand, six hundred seventy-nine".