16779347 has 4 divisors (see below), whose sum is σ = 18070080. Its totient is φ = 15488616.

The previous prime is 16779341. The next prime is 16779361. The reversal of 16779347 is 74397761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74397761 = 59 ⋅1260979.

It is not a de Polignac number, because 16779347 - 2⁶ = 16779283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16779298 and 16779307.

It is not an unprimeable number, because it can be changed into a prime (16779341) 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, 645347 + ... + 645372.

It is an arithmetic number, because the mean of its divisors is an integer number (4517520).

Almost surely, 2^16779347 is an apocalyptic number.

16779347 is a deficient number, since it is larger than the sum of its proper divisors (1290733).

16779347 is a wasteful number, since it uses less digits than its factorization.

16779347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290732.

The product of its digits is 222264, while the sum is 44.

The square root of 16779347 is about 4096.2601235761. The cubic root of 16779347 is about 256.0108383676.

The spelling of 16779347 in words is "sixteen million, seven hundred seventy-nine thousand, three hundred forty-seven".