16939427 has 2 divisors, whose sum is σ = 16939428. Its totient is φ = 16939426.

The previous prime is 16939399. The next prime is 16939453. The reversal of 16939427 is 72493961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16939427 - 2¹⁰ = 16938403 is a prime.

It is not a weakly prime, because it can be changed into another prime (16939457) 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, 8469713 + 8469714.

It is an arithmetic number, because the mean of its divisors is an integer number (8469714).

Almost surely, 2^16939427 is an apocalyptic number.

16939427 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939427 is an equidigital number, since it uses as much as digits as its factorization.

16939427 is an odious number, because the sum of its binary digits is odd.

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

The square root of 16939427 is about 4115.7535154574. The cubic root of 16939427 is about 256.8224030025.

The spelling of 16939427 in words is "sixteen million, nine hundred thirty-nine thousand, four hundred twenty-seven".