16912729 has 2 divisors, whose sum is σ = 16912730. Its totient is φ = 16912728.

The previous prime is 16912723. The next prime is 16912733. The reversal of 16912729 is 92721961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 5890329 = 3320^2 + 2427^2 .

It is a cyclic number.

It is not a de Polignac number, because 16912729 - 2⁷ = 16912601 is a prime.

It is not a weakly prime, because it can be changed into another prime (16912723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8456364 + 8456365.

It is an arithmetic number, because the mean of its divisors is an integer number (8456365).

Almost surely, 2^16912729 is an apocalyptic number.

It is an amenable number.

16912729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16912729 is an equidigital number, since it uses as much as digits as its factorization.

16912729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 16912729 is about 4112.5088449753. The cubic root of 16912729 is about 256.6874072931.

The spelling of 16912729 in words is "sixteen million, nine hundred twelve thousand, seven hundred twenty-nine".