839945 has 8 divisors (see below), whose sum is σ = 1040640. Its totient is φ = 650160.

The previous prime is 839921. The next prime is 839957. The reversal of 839945 is 549938.

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

It is a de Polignac number, because none of the positive numbers 2^k-839945 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 839899 and 839908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555 + ... + 2864.

It is an arithmetic number, because the mean of its divisors is an integer number (130080).

2⁸³⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

839945 is a deficient number, since it is larger than the sum of its proper divisors (200695).

839945 is a wasteful number, since it uses less digits than its factorization.

839945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455.

The product of its digits is 38880, while the sum is 38.

The square root of 839945 is about 916.4851335401. The cubic root of 839945 is about 94.3518202505.

The spelling of 839945 in words is "eight hundred thirty-nine thousand, nine hundred forty-five".