189550903 has 2 divisors, whose sum is σ = 189550904. Its totient is φ = 189550902.

The previous prime is 189550877. The next prime is 189550919. The reversal of 189550903 is 309055981.

189550903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189550903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189550993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94775451 + 94775452.

It is an arithmetic number, because the mean of its divisors is an integer number (94775452).

Almost surely, 2^189550903 is an apocalyptic number.

189550903 is a deficient number, since it is larger than the sum of its proper divisors (1).

189550903 is an equidigital number, since it uses as much as digits as its factorization.

189550903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 189550903 is about 13767.7486540102. The cubic root of 189550903 is about 574.4364010016.

The spelling of 189550903 in words is "one hundred eighty-nine million, five hundred fifty thousand, nine hundred three".