189905343 has 8 divisors (see below), whose sum is σ = 253349808. Its totient is φ = 126532224.

The previous prime is 189905327. The next prime is 189905357. The reversal of 189905343 is 343509981.

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

It is not a de Polignac number, because 189905343 - 2⁴ = 189905327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189905295 and 189905304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189905363) 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, 11280 + ... + 22517.

It is an arithmetic number, because the mean of its divisors is an integer number (31668726).

Almost surely, 2^189905343 is an apocalyptic number.

189905343 is a deficient number, since it is larger than the sum of its proper divisors (63444465).

189905343 is a wasteful number, since it uses less digits than its factorization.

189905343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35673.

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

The square root of 189905343 is about 13780.6147540667. The cubic root of 189905343 is about 574.7942230271.

The spelling of 189905343 in words is "one hundred eighty-nine million, nine hundred five thousand, three hundred forty-three".