839901 has 4 divisors (see below), whose sum is σ = 1119872. Its totient is φ = 559932.

The previous prime is 839899. The next prime is 839903. The reversal of 839901 is 109938.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (839899) and next prime (839903).

It is not a de Polignac number, because 839901 - 2¹ = 839899 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139981 + ... + 139986.

It is an arithmetic number, because the mean of its divisors is an integer number (279968).

2⁸³⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

839901 is a deficient number, since it is larger than the sum of its proper divisors (279971).

839901 is a wasteful number, since it uses less digits than its factorization.

839901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279970.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 839901 is about 916.4611284719. The cubic root of 839901 is about 94.3501727011.

The spelling of 839901 in words is "eight hundred thirty-nine thousand, nine hundred one".