16391339 has 2 divisors, whose sum is σ = 16391340. Its totient is φ = 16391338.

The previous prime is 16391329. The next prime is 16391359. The reversal of 16391339 is 93319361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16391339 - 2⁸ = 16391083 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 16391299 and 16391308.

It is not a weakly prime, because it can be changed into another prime (16391329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195669 + 8195670.

It is an arithmetic number, because the mean of its divisors is an integer number (8195670).

Almost surely, 2^16391339 is an apocalyptic number.

16391339 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391339 is an equidigital number, since it uses as much as digits as its factorization.

16391339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 35.

The square root of 16391339 is about 4048.6218642891. The cubic root of 16391339 is about 254.0220856237.

The spelling of 16391339 in words is "sixteen million, three hundred ninety-one thousand, three hundred thirty-nine".