189453903 has 8 divisors (see below), whose sum is σ = 254534016. Its totient is φ = 125338200.

The previous prime is 189453877. The next prime is 189453917. The reversal of 189453903 is 309354981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189453903 - 2⁹ = 189453391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189453923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240643 + ... + 241428.

It is an arithmetic number, because the mean of its divisors is an integer number (31816752).

Almost surely, 2^189453903 is an apocalyptic number.

189453903 is a deficient number, since it is larger than the sum of its proper divisors (65080113).

189453903 is a wasteful number, since it uses less digits than its factorization.

189453903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482205.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 189453903 is about 13764.2254776649. The cubic root of 189453903 is about 574.3383977081.

The spelling of 189453903 in words is "one hundred eighty-nine million, four hundred fifty-three thousand, nine hundred three".