831479069 has 4 divisors (see below), whose sum is σ = 831537696. Its totient is φ = 831420444.

The previous prime is 831479063. The next prime is 831479087. The reversal of 831479069 is 960974138.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831479069 is a prime.

It is a super-2 number, since 2×831479069² = 1382714884370213522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831479063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6752 + ... + 41334.

It is an arithmetic number, because the mean of its divisors is an integer number (207884424).

Almost surely, 2^831479069 is an apocalyptic number.

It is an amenable number.

831479069 is a deficient number, since it is larger than the sum of its proper divisors (58627).

831479069 is a wasteful number, since it uses less digits than its factorization.

831479069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58626.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 831479069 is about 28835.3787733055. The cubic root of 831479069 is about 940.3375387325.

The spelling of 831479069 in words is "eight hundred thirty-one million, four hundred seventy-nine thousand, sixty-nine".