869771039 has 4 divisors (see below), whose sum is σ = 870550824. Its totient is φ = 868991256.

The previous prime is 869771033. The next prime is 869771041. The reversal of 869771039 is 930177968.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869771039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869771033) 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, 388217 + ... + 390450.

It is an arithmetic number, because the mean of its divisors is an integer number (217637706).

Almost surely, 2^869771039 is an apocalyptic number.

869771039 is a deficient number, since it is larger than the sum of its proper divisors (779785).

869771039 is a wasteful number, since it uses less digits than its factorization.

869771039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779784.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 869771039 is about 29491.8808996646. The cubic root of 869771039 is about 954.5565182278.

The spelling of 869771039 in words is "eight hundred sixty-nine million, seven hundred seventy-one thousand, thirty-nine".