16043639 has 2 divisors, whose sum is σ = 16043640. Its totient is φ = 16043638.

The previous prime is 16043633. The next prime is 16043663. The reversal of 16043639 is 93634061.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16043639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16043633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021819 + 8021820.

It is an arithmetic number, because the mean of its divisors is an integer number (8021820).

Almost surely, 2^16043639 is an apocalyptic number.

16043639 is a deficient number, since it is larger than the sum of its proper divisors (1).

16043639 is an equidigital number, since it uses as much as digits as its factorization.

16043639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 16043639 is about 4005.4511606060. The cubic root of 16043639 is about 252.2130924120.

The spelling of 16043639 in words is "sixteen million, forty-three thousand, six hundred thirty-nine".