189849903 has 4 divisors (see below), whose sum is σ = 253133208. Its totient is φ = 126566600.

The previous prime is 189849893. The next prime is 189849917. The reversal of 189849903 is 309948981.

It is a happy number.

189849903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189849903 - 2²¹ = 187752751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189849503) 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, 31641648 + ... + 31641653.

It is an arithmetic number, because the mean of its divisors is an integer number (63283302).

Almost surely, 2^189849903 is an apocalyptic number.

189849903 is a deficient number, since it is larger than the sum of its proper divisors (63283305).

189849903 is an equidigital number, since it uses as much as digits as its factorization.

189849903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63283304.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 189849903 is about 13778.6030859445. The cubic root of 189849903 is about 574.7382834158.

The spelling of 189849903 in words is "one hundred eighty-nine million, eight hundred forty-nine thousand, nine hundred three".