16997863 has 2 divisors, whose sum is σ = 16997864. Its totient is φ = 16997862.

The previous prime is 16997861. The next prime is 16997867. The reversal of 16997863 is 36879961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16997863 - 2¹ = 16997861 is a prime.

Together with 16997861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16997861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8498931 + 8498932.

It is an arithmetic number, because the mean of its divisors is an integer number (8498932).

Almost surely, 2^16997863 is an apocalyptic number.

16997863 is a deficient number, since it is larger than the sum of its proper divisors (1).

16997863 is an equidigital number, since it uses as much as digits as its factorization.

16997863 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 16997863 is about 4122.8464681576. The cubic root of 16997863 is about 257.1173844403.

The spelling of 16997863 in words is "sixteen million, nine hundred ninety-seven thousand, eight hundred sixty-three".