839953 has 4 divisors (see below), whose sum is σ = 889380. Its totient is φ = 790528.

The previous prime is 839921. The next prime is 839957. The reversal of 839953 is 359938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 359938 = 2 ⋅179969.

It can be written as a sum of positive squares in 2 ways, for example, as 494209 + 345744 = 703^2 + 588^2 .

It is a cyclic number.

It is not a de Polignac number, because 839953 - 2⁵ = 839921 is a prime.

It is a Duffinian number.

839953 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (839957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24688 + ... + 24721.

It is an arithmetic number, because the mean of its divisors is an integer number (222345).

2⁸³⁹⁹⁵³ is an apocalyptic number.

It is an amenable number.

839953 is a deficient number, since it is larger than the sum of its proper divisors (49427).

839953 is a wasteful number, since it uses less digits than its factorization.

839953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49426.

The product of its digits is 29160, while the sum is 37.

The square root of 839953 is about 916.4894980304. The cubic root of 839953 is about 94.3521197988.

The spelling of 839953 in words is "eight hundred thirty-nine thousand, nine hundred fifty-three".