189616903 has 32 divisors (see below), whose sum is σ = 234662400. Its totient is φ = 149630976.

The previous prime is 189616879. The next prime is 189616909. The reversal of 189616903 is 309616981.

189616903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 189616903 - 2⁹ = 189616391 is a prime.

It is a super-2 number, since 2×189616903² = 71909139806622818, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 189616903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189616909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 982375 + ... + 982567.

It is an arithmetic number, because the mean of its divisors is an integer number (7333200).

Almost surely, 2^189616903 is an apocalyptic number.

189616903 is a deficient number, since it is larger than the sum of its proper divisors (45045497).

189616903 is a wasteful number, since it uses less digits than its factorization.

189616903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 189616903 is about 13770.1453514478. The cubic root of 189616903 is about 574.5030645423.

The spelling of 189616903 in words is "one hundred eighty-nine million, six hundred sixteen thousand, nine hundred three".