871428769 has 4 divisors (see below), whose sum is σ = 871919296. Its totient is φ = 870938244.

The previous prime is 871428757. The next prime is 871428791. The reversal of 871428769 is 967824178.

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 a cyclic number.

It is not a de Polignac number, because 871428769 - 2¹³ = 871420577 is a prime.

It is a super-2 number, since 2×871428769² = 1518776198881710722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871428799) 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, 242589 + ... + 246154.

It is an arithmetic number, because the mean of its divisors is an integer number (217979824).

Almost surely, 2^871428769 is an apocalyptic number.

It is an amenable number.

871428769 is a deficient number, since it is larger than the sum of its proper divisors (490527).

871428769 is a wasteful number, since it uses less digits than its factorization.

871428769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490526.

The product of its digits is 1354752, while the sum is 52.

The square root of 871428769 is about 29519.9723746483. The cubic root of 871428769 is about 955.1625753211.

The spelling of 871428769 in words is "eight hundred seventy-one million, four hundred twenty-eight thousand, seven hundred sixty-nine".