16399273 has 4 divisors (see below), whose sum is σ = 17890128. Its totient is φ = 14908420.

The previous prime is 16399259. The next prime is 16399283. The reversal of 16399273 is 37299361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16399273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16399283) 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, 745411 + ... + 745432.

It is an arithmetic number, because the mean of its divisors is an integer number (4472532).

Almost surely, 2^16399273 is an apocalyptic number.

It is an amenable number.

16399273 is a deficient number, since it is larger than the sum of its proper divisors (1490855).

16399273 is a wasteful number, since it uses less digits than its factorization.

16399273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490854.

The product of its digits is 61236, while the sum is 40.

The square root of 16399273 is about 4049.6015853415. The cubic root of 16399273 is about 254.0630643003.

The spelling of 16399273 in words is "sixteen million, three hundred ninety-nine thousand, two hundred seventy-three".