16383949 has 2 divisors, whose sum is σ = 16383950. Its totient is φ = 16383948.

The previous prime is 16383931. The next prime is 16383973. The reversal of 16383949 is 94938361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12830724 + 3553225 = 3582^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 16383949 - 2⁷ = 16383821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16383449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8191974 + 8191975.

It is an arithmetic number, because the mean of its divisors is an integer number (8191975).

Almost surely, 2^16383949 is an apocalyptic number.

It is an amenable number.

16383949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16383949 is an equidigital number, since it uses as much as digits as its factorization.

16383949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 16383949 is about 4047.7091051606. The cubic root of 16383949 is about 253.9839047813.

The spelling of 16383949 in words is "sixteen million, three hundred eighty-three thousand, nine hundred forty-nine".