16939249 has 2 divisors, whose sum is σ = 16939250. Its totient is φ = 16939248.

The previous prime is 16939243. The next prime is 16939253. The reversal of 16939249 is 94293961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16548624 + 390625 = 4068^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939249 - 2¹⁵ = 16906481 is a prime.

It is not a weakly prime, because it can be changed into another prime (16939243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469624 + 8469625.

It is an arithmetic number, because the mean of its divisors is an integer number (8469625).

Almost surely, 2^16939249 is an apocalyptic number.

It is an amenable number.

16939249 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939249 is an equidigital number, since it uses as much as digits as its factorization.

16939249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 16939249 is about 4115.7318911708. The cubic root of 16939249 is about 256.8215034335.

The spelling of 16939249 in words is "sixteen million, nine hundred thirty-nine thousand, two hundred forty-nine".