16383749 has 2 divisors, whose sum is σ = 16383750. Its totient is φ = 16383748.

The previous prime is 16383739. The next prime is 16383781. The reversal of 16383749 is 94738361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13432225 + 2951524 = 3665^2 + 1718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16383749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16383709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8191874 + 8191875.

It is an arithmetic number, because the mean of its divisors is an integer number (8191875).

Almost surely, 2^16383749 is an apocalyptic number.

It is an amenable number.

16383749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16383749 is an equidigital number, since it uses as much as digits as its factorization.

16383749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 16383749 is about 4047.6843997525. The cubic root of 16383749 is about 253.9828713107.

The spelling of 16383749 in words is "sixteen million, three hundred eighty-three thousand, seven hundred forty-nine".