16699387 has 2 divisors, whose sum is σ = 16699388. Its totient is φ = 16699386.

The previous prime is 16699369. The next prime is 16699391. The reversal of 16699387 is 78399661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16699387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16699387.

It is not a weakly prime, because it can be changed into another prime (16699307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8349693 + 8349694.

It is an arithmetic number, because the mean of its divisors is an integer number (8349694).

Almost surely, 2^16699387 is an apocalyptic number.

16699387 is a deficient number, since it is larger than the sum of its proper divisors (1).

16699387 is an equidigital number, since it uses as much as digits as its factorization.

16699387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 16699387 is about 4086.4883457560. The cubic root of 16699387 is about 255.6035275273.

The spelling of 16699387 in words is "sixteen million, six hundred ninety-nine thousand, three hundred eighty-seven".