16368391 has 4 divisors (see below), whose sum is σ = 17627512. Its totient is φ = 15109272.

The previous prime is 16368379. The next prime is 16368397. The reversal of 16368391 is 19386361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19386361 = 2711 ⋅7151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16368391 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16368391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16368397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629541 + ... + 629566.

It is an arithmetic number, because the mean of its divisors is an integer number (4406878).

Almost surely, 2^16368391 is an apocalyptic number.

16368391 is a deficient number, since it is larger than the sum of its proper divisors (1259121).

16368391 is a wasteful number, since it uses less digits than its factorization.

16368391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259120.

The product of its digits is 23328, while the sum is 37.

The square root of 16368391 is about 4045.7868208792. The cubic root of 16368391 is about 253.9034859720.

The spelling of 16368391 in words is "sixteen million, three hundred sixty-eight thousand, three hundred ninety-one".