16947841 has 2 divisors, whose sum is σ = 16947842. Its totient is φ = 16947840.

The previous prime is 16947823. The next prime is 16947857. The reversal of 16947841 is 14874961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 6682225 = 3204^2 + 2585^2 .

It is an emirp because it is prime and its reverse (14874961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16947841 - 2¹¹ = 16945793 is a prime.

It is a super-2 number, since 2×16947841² = 574458629122562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16947794 and 16947803.

It is not a weakly prime, because it can be changed into another prime (16947811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8473920 + 8473921.

It is an arithmetic number, because the mean of its divisors is an integer number (8473921).

Almost surely, 2^16947841 is an apocalyptic number.

It is an amenable number.

16947841 is a deficient number, since it is larger than the sum of its proper divisors (1).

16947841 is an equidigital number, since it uses as much as digits as its factorization.

16947841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 16947841 is about 4116.7755586138. The cubic root of 16947841 is about 256.8649181362.

The spelling of 16947841 in words is "sixteen million, nine hundred forty-seven thousand, eight hundred forty-one".