16939747 has 8 divisors (see below), whose sum is σ = 18979632. Its totient is φ = 14983200.

The previous prime is 16939729. The next prime is 16939757. The reversal of 16939747 is 74793961.

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 16939747 - 2¹⁹ = 16415459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16939697 and 16939706.

It is not an unprimeable number, because it can be changed into a prime (16939757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20404 + ... + 21217.

It is an arithmetic number, because the mean of its divisors is an integer number (2372454).

Almost surely, 2^16939747 is an apocalyptic number.

16939747 is a deficient number, since it is larger than the sum of its proper divisors (2039885).

16939747 is a wasteful number, since it uses less digits than its factorization.

16939747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41669.

The product of its digits is 285768, while the sum is 46.

The square root of 16939747 is about 4115.7923902938. The cubic root of 16939747 is about 256.8240201892.

Adding to 16939747 its product of digits (285768), we get a triangular number (17225515 = T₅₈₆₉).

The spelling of 16939747 in words is "sixteen million, nine hundred thirty-nine thousand, seven hundred forty-seven".