16940447 has 2 divisors, whose sum is σ = 16940448. Its totient is φ = 16940446.

The previous prime is 16940431. The next prime is 16940459. The reversal of 16940447 is 74404961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16940447 - 2⁴ = 16940431 is a prime.

It is equal to p_1087676 and since 16940447 and 1087676 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16940467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8470223 + 8470224.

It is an arithmetic number, because the mean of its divisors is an integer number (8470224).

Almost surely, 2^16940447 is an apocalyptic number.

16940447 is a deficient number, since it is larger than the sum of its proper divisors (1).

16940447 is an equidigital number, since it uses as much as digits as its factorization.

16940447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 16940447 is about 4115.8774277182. The cubic root of 16940447 is about 256.8275577143.

The spelling of 16940447 in words is "sixteen million, nine hundred forty thousand, four hundred forty-seven".