16939247 has 16 divisors (see below), whose sum is σ = 19201728. Its totient is φ = 14826240.

The previous prime is 16939243. The next prime is 16939249. The reversal of 16939247 is 74293961.

It is not a de Polignac number, because 16939247 - 2² = 16939243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53963 + ... + 54275.

It is an arithmetic number, because the mean of its divisors is an integer number (1200108).

Almost surely, 2^16939247 is an apocalyptic number.

16939247 is a deficient number, since it is larger than the sum of its proper divisors (2262481).

16939247 is a wasteful number, since it uses less digits than its factorization.

16939247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its digits is 81648, while the sum is 41.

The square root of 16939247 is about 4115.7316482006. The cubic root of 16939247 is about 256.8214933259.

The spelling of 16939247 in words is "sixteen million, nine hundred thirty-nine thousand, two hundred forty-seven".