871392069 has 24 divisors (see below), whose sum is σ = 1368745560. Its totient is φ = 531975168.

The previous prime is 871392061. The next prime is 871392083. The reversal of 871392069 is 960293178.

871392069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 233172900 + 638219169 = 15270^2 + 25263^2 .

It is not a de Polignac number, because 871392069 - 2³ = 871392061 is a prime.

It is a super-2 number, since 2×871392069² = 1518648275832201522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871392061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71304 + ... + 82625.

It is an arithmetic number, because the mean of its divisors is an integer number (57031065).

Almost surely, 2^871392069 is an apocalyptic number.

It is an amenable number.

871392069 is a deficient number, since it is larger than the sum of its proper divisors (497353491).

871392069 is a wasteful number, since it uses less digits than its factorization.

871392069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153989 (or 153986 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 871392069 is about 29519.3507550556. The cubic root of 871392069 is about 955.1491663236.

The spelling of 871392069 in words is "eight hundred seventy-one million, three hundred ninety-two thousand, sixty-nine".