16970909 has 2 divisors, whose sum is σ = 16970910. Its totient is φ = 16970908.

The previous prime is 16970897. The next prime is 16970911. The reversal of 16970909 is 90907961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9424900 + 7546009 = 3070^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 16970909 - 2⁴ = 16970893 is a prime.

Together with 16970911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16970999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8485454 + 8485455.

It is an arithmetic number, because the mean of its divisors is an integer number (8485455).

Almost surely, 2^16970909 is an apocalyptic number.

It is an amenable number.

16970909 is a deficient number, since it is larger than the sum of its proper divisors (1).

16970909 is an equidigital number, since it uses as much as digits as its factorization.

16970909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 16970909 is about 4119.5763131662. The cubic root of 16970909 is about 256.9814063975.

The spelling of 16970909 in words is "sixteen million, nine hundred seventy thousand, nine hundred nine".