16391069 has 2 divisors, whose sum is σ = 16391070. Its totient is φ = 16391068.

The previous prime is 16391059. The next prime is 16391071. The reversal of 16391069 is 96019361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 3467044 = 3595^2 + 1862^2 .

It is an emirp because it is prime and its reverse (96019361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16391069 is a prime.

It is a super-2 number, since 2×16391069² = 537334285925522, which contains 22 as substring.

Together with 16391071, 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 (16391029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195534 + 8195535.

It is an arithmetic number, because the mean of its divisors is an integer number (8195535).

Almost surely, 2^16391069 is an apocalyptic number.

It is an amenable number.

16391069 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391069 is an equidigital number, since it uses as much as digits as its factorization.

16391069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 16391069 is about 4048.5885194719. The cubic root of 16391069 is about 254.0206908559.

The spelling of 16391069 in words is "sixteen million, three hundred ninety-one thousand, sixty-nine".