16363987 has 2 divisors, whose sum is σ = 16363988. Its totient is φ = 16363986.

The previous prime is 16363957. The next prime is 16363993. The reversal of 16363987 is 78936361.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16363987 is a prime.

It is not a weakly prime, because it can be changed into another prime (16363927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8181993 + 8181994.

It is an arithmetic number, because the mean of its divisors is an integer number (8181994).

Almost surely, 2^16363987 is an apocalyptic number.

16363987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16363987 is an equidigital number, since it uses as much as digits as its factorization.

16363987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 16363987 is about 4045.2425143618. The cubic root of 16363987 is about 253.8807125820.

The spelling of 16363987 in words is "sixteen million, three hundred sixty-three thousand, nine hundred eighty-seven".