16940897 has 2 divisors, whose sum is σ = 16940898. Its totient is φ = 16940896.

The previous prime is 16940893. The next prime is 16940899. The reversal of 16940897 is 79804961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 2531281 = 3796^2 + 1591^2 .

It is a cyclic number.

It is not a de Polignac number, because 16940897 - 2² = 16940893 is a prime.

Together with 16940899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16940893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8470448 + 8470449.

It is an arithmetic number, because the mean of its divisors is an integer number (8470449).

Almost surely, 2^16940897 is an apocalyptic number.

It is an amenable number.

16940897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16940897 is an equidigital number, since it uses as much as digits as its factorization.

16940897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16940897 is about 4115.9320937061. The cubic root of 16940897 is about 256.8298317860.

The spelling of 16940897 in words is "sixteen million, nine hundred forty thousand, eight hundred ninety-seven".