16942309 has 2 divisors, whose sum is σ = 16942310. Its totient is φ = 16942308.

The previous prime is 16942297. The next prime is 16942313. The reversal of 16942309 is 90324961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 2879809 = 3750^2 + 1697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16942309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16942339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8471154 + 8471155.

It is an arithmetic number, because the mean of its divisors is an integer number (8471155).

Almost surely, 2^16942309 is an apocalyptic number.

It is an amenable number.

16942309 is a deficient number, since it is larger than the sum of its proper divisors (1).

16942309 is an equidigital number, since it uses as much as digits as its factorization.

16942309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 16942309 is about 4116.1036187152. The cubic root of 16942309 is about 256.8369670565.

The spelling of 16942309 in words is "sixteen million, nine hundred forty-two thousand, three hundred nine".