16398699 has 4 divisors (see below), whose sum is σ = 21864936. Its totient is φ = 10932464.

The previous prime is 16398671. The next prime is 16398731. The reversal of 16398699 is 99689361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16398699 - 2⁵ = 16398667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16398619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2733114 + ... + 2733119.

It is an arithmetic number, because the mean of its divisors is an integer number (5466234).

Almost surely, 2^16398699 is an apocalyptic number.

16398699 is a deficient number, since it is larger than the sum of its proper divisors (5466237).

16398699 is an equidigital number, since it uses as much as digits as its factorization.

16398699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5466236.

The product of its digits is 629856, while the sum is 51.

The square root of 16398699 is about 4049.5307135519. The cubic root of 16398699 is about 254.0601000652.

The spelling of 16398699 in words is "sixteen million, three hundred ninety-eight thousand, six hundred ninety-nine".