16667897 has 2 divisors, whose sum is σ = 16667898. Its totient is φ = 16667896.

The previous prime is 16667879. The next prime is 16667957. The reversal of 16667897 is 79876661.

Together with previous prime (16667879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15594601 + 1073296 = 3949^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 16667897 - 2⁸ = 16667641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16667857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333948 + 8333949.

It is an arithmetic number, because the mean of its divisors is an integer number (8333949).

Almost surely, 2^16667897 is an apocalyptic number.

It is an amenable number.

16667897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16667897 is an equidigital number, since it uses as much as digits as its factorization.

16667897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 16667897 is about 4082.6335863019. The cubic root of 16667897 is about 255.4427627501.

The spelling of 16667897 in words is "sixteen million, six hundred sixty-seven thousand, eight hundred ninety-seven".