189964903 has 2 divisors, whose sum is σ = 189964904. Its totient is φ = 189964902.

The previous prime is 189964871. The next prime is 189964939. The reversal of 189964903 is 309469981.

189964903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (309469981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189964903 - 2⁵ = 189964871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189964403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94982451 + 94982452.

It is an arithmetic number, because the mean of its divisors is an integer number (94982452).

Almost surely, 2^189964903 is an apocalyptic number.

189964903 is a deficient number, since it is larger than the sum of its proper divisors (1).

189964903 is an equidigital number, since it uses as much as digits as its factorization.

189964903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 189964903 is about 13782.7755912951. The cubic root of 189964903 is about 574.8543076373.

The spelling of 189964903 in words is "one hundred eighty-nine million, nine hundred sixty-four thousand, nine hundred three".