839993929 has 4 divisors (see below), whose sum is σ = 841547140. Its totient is φ = 838440720.

The previous prime is 839993923. The next prime is 839993951. The reversal of 839993929 is 929399938.

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 599123529 + 240870400 = 24477^2 + 15520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839993929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (839993923) 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, 775794 + ... + 776875.

It is an arithmetic number, because the mean of its divisors is an integer number (210386785).

Almost surely, 2^839993929 is an apocalyptic number.

It is an amenable number.

839993929 is a deficient number, since it is larger than the sum of its proper divisors (1553211).

839993929 is a wasteful number, since it uses less digits than its factorization.

839993929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553210.

The product of its digits is 8503056, while the sum is 61.

The square root of 839993929 is about 28982.6487574894. The cubic root of 839993929 is about 943.5365229531.

The spelling of 839993929 in words is "eight hundred thirty-nine million, nine hundred ninety-three thousand, nine hundred twenty-nine".