16696639 has 2 divisors, whose sum is σ = 16696640. Its totient is φ = 16696638.

The previous prime is 16696627. The next prime is 16696661. The reversal of 16696639 is 93669661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16696639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16696699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348319 + 8348320.

It is an arithmetic number, because the mean of its divisors is an integer number (8348320).

Almost surely, 2^16696639 is an apocalyptic number.

16696639 is a deficient number, since it is larger than the sum of its proper divisors (1).

16696639 is an equidigital number, since it uses as much as digits as its factorization.

16696639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 46.

The square root of 16696639 is about 4086.1521019169. The cubic root of 16696639 is about 255.5895063135.

The spelling of 16696639 in words is "sixteen million, six hundred ninety-six thousand, six hundred thirty-nine".