16779649 has 8 divisors (see below), whose sum is σ = 17368832. Its totient is φ = 16193520.

The previous prime is 16779647. The next prime is 16779667. The reversal of 16779649 is 94697761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16779649 - 2¹ = 16779647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16779647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18562 + ... + 19444.

It is an arithmetic number, because the mean of its divisors is an integer number (2171104).

Almost surely, 2^16779649 is an apocalyptic number.

It is an amenable number.

16779649 is a deficient number, since it is larger than the sum of its proper divisors (589183).

16779649 is an equidigital number, since it uses as much as digits as its factorization.

16779649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527.

The product of its digits is 571536, while the sum is 49.

The square root of 16779649 is about 4096.2969863036. The cubic root of 16779649 is about 256.0123742798.

The spelling of 16779649 in words is "sixteen million, seven hundred seventy-nine thousand, six hundred forty-nine".