16193389 has 4 divisors (see below), whose sum is σ = 16321024. Its totient is φ = 16065756.

The previous prime is 16193369. The next prime is 16193407. The reversal of 16193389 is 98339161.

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 not a de Polignac number, because 16193389 - 2²¹ = 14096237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16193369) 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, 63627 + ... + 63880.

It is an arithmetic number, because the mean of its divisors is an integer number (4080256).

Almost surely, 2^16193389 is an apocalyptic number.

It is an amenable number.

16193389 is a deficient number, since it is larger than the sum of its proper divisors (127635).

16193389 is a wasteful number, since it uses less digits than its factorization.

16193389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127634.

The product of its digits is 34992, while the sum is 40.

The square root of 16193389 is about 4024.1010176187. The cubic root of 16193389 is about 252.9953755658.

The spelling of 16193389 in words is "sixteen million, one hundred ninety-three thousand, three hundred eighty-nine".