16639019 has 2 divisors, whose sum is σ = 16639020. Its totient is φ = 16639018.

The previous prime is 16639001. The next prime is 16639027. The reversal of 16639019 is 91093661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16639019 is a prime.

It is a super-2 number, since 2×16639019² = 553713906564722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16639019.

It is not a weakly prime, because it can be changed into another prime (16639099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319509 + 8319510.

It is an arithmetic number, because the mean of its divisors is an integer number (8319510).

Almost surely, 2^16639019 is an apocalyptic number.

16639019 is a deficient number, since it is larger than the sum of its proper divisors (1).

16639019 is an equidigital number, since it uses as much as digits as its factorization.

16639019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 16639019 is about 4079.0953653966. The cubic root of 16639019 is about 255.2951548392.

The spelling of 16639019 in words is "sixteen million, six hundred thirty-nine thousand, nineteen".