16381189 has 4 divisors (see below), whose sum is σ = 17870400. Its totient is φ = 14891980.

The previous prime is 16381171. The next prime is 16381193. The reversal of 16381189 is 98118361.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98118361 = 11 ⋅8919851.

It is a cyclic number.

It is not a de Polignac number, because 16381189 - 2⁷ = 16381061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381139) 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, 744589 + ... + 744610.

It is an arithmetic number, because the mean of its divisors is an integer number (4467600).

Almost surely, 2^16381189 is an apocalyptic number.

It is an amenable number.

16381189 is a deficient number, since it is larger than the sum of its proper divisors (1489211).

16381189 is a wasteful number, since it uses less digits than its factorization.

16381189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489210.

The product of its digits is 10368, while the sum is 37.

The square root of 16381189 is about 4047.3681572103. The cubic root of 16381189 is about 253.9696421444.

The spelling of 16381189 in words is "sixteen million, three hundred eighty-one thousand, one hundred eighty-nine".