16039649 has 2 divisors, whose sum is σ = 16039650. Its totient is φ = 16039648.

The previous prime is 16039631. The next prime is 16039711. The reversal of 16039649 is 94693061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15171025 + 868624 = 3895^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 16039649 - 2⁸ = 16039393 is a prime.

It is not a weakly prime, because it can be changed into another prime (16036649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8019824 + 8019825.

It is an arithmetic number, because the mean of its divisors is an integer number (8019825).

Almost surely, 2^16039649 is an apocalyptic number.

It is an amenable number.

16039649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16039649 is an equidigital number, since it uses as much as digits as its factorization.

16039649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 16039649 is about 4004.9530584016. The cubic root of 16039649 is about 252.1921824909.

The spelling of 16039649 in words is "sixteen million, thirty-nine thousand, six hundred forty-nine".