16939771 has 2 divisors, whose sum is σ = 16939772. Its totient is φ = 16939770.

The previous prime is 16939763. The next prime is 16939801. The reversal of 16939771 is 17793961.

It is a weak prime.

It is an emirp because it is prime and its reverse (17793961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16939771 - 2³ = 16939763 is a prime.

It is not a weakly prime, because it can be changed into another prime (16939711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469885 + 8469886.

It is an arithmetic number, because the mean of its divisors is an integer number (8469886).

Almost surely, 2^16939771 is an apocalyptic number.

16939771 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939771 is an equidigital number, since it uses as much as digits as its factorization.

16939771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 43.

The square root of 16939771 is about 4115.7953058917. The cubic root of 16939771 is about 256.8241414774.

The spelling of 16939771 in words is "sixteen million, nine hundred thirty-nine thousand, seven hundred seventy-one".