16329389 has 2 divisors, whose sum is σ = 16329390. Its totient is φ = 16329388.

The previous prime is 16329359. The next prime is 16329403. The reversal of 16329389 is 98392361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 3960100 = 3517^2 + 1990^2 .

It is a cyclic number.

It is not a de Polignac number, because 16329389 - 2¹⁶ = 16263853 is a prime.

It is a super-2 number, since 2×16329389² = 533297890226642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16329329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8164694 + 8164695.

It is an arithmetic number, because the mean of its divisors is an integer number (8164695).

Almost surely, 2^16329389 is an apocalyptic number.

It is an amenable number.

16329389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16329389 is an equidigital number, since it uses as much as digits as its factorization.

16329389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 16329389 is about 4040.9638701676. The cubic root of 16329389 is about 253.7016616247.

The spelling of 16329389 in words is "sixteen million, three hundred twenty-nine thousand, three hundred eighty-nine".