839041993 has 4 divisors (see below), whose sum is σ = 854873028. Its totient is φ = 823210960.

The previous prime is 839041991. The next prime is 839042023. The reversal of 839041993 is 399140938.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 593555769 + 245486224 = 24363^2 + 15668^2 .

It is a cyclic number.

It is not a de Polignac number, because 839041993 - 2¹ = 839041991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (839041991) 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, 7915438 + ... + 7915543.

It is an arithmetic number, because the mean of its divisors is an integer number (213718257).

Almost surely, 2^839041993 is an apocalyptic number.

It is an amenable number.

839041993 is a deficient number, since it is larger than the sum of its proper divisors (15831035).

839041993 is a wasteful number, since it uses less digits than its factorization.

839041993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15831034.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 839041993 is about 28966.2215865308. The cubic root of 839041993 is about 943.1799624825.

The spelling of 839041993 in words is "eight hundred thirty-nine million, forty-one thousand, nine hundred ninety-three".