16396987 has 2 divisors, whose sum is σ = 16396988. Its totient is φ = 16396986.

The previous prime is 16396973. The next prime is 16396997. The reversal of 16396987 is 78969361.

It is a strong prime.

It is an emirp because it is prime and its reverse (78969361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16396987 - 2¹⁵ = 16364219 is a prime.

It is a super-2 number, since 2×16396987² = 537722365356338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16396987.

It is not a weakly prime, because it can be changed into another prime (16396927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8198493 + 8198494.

It is an arithmetic number, because the mean of its divisors is an integer number (8198494).

Almost surely, 2^16396987 is an apocalyptic number.

16396987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16396987 is an equidigital number, since it uses as much as digits as its factorization.

16396987 is an odious number, because the sum of its binary digits is odd.

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

The square root of 16396987 is about 4049.3193255163. The cubic root of 16396987 is about 254.0512585909.

The spelling of 16396987 in words is "sixteen million, three hundred ninety-six thousand, nine hundred eighty-seven".