865676449 has 4 divisors (see below), whose sum is σ = 944374320. Its totient is φ = 786978580.

The previous prime is 865676447. The next prime is 865676453. The reversal of 865676449 is 944676568.

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 865676449 - 2¹ = 865676447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865676449.

It is not an unprimeable number, because it can be changed into a prime (865676443) 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, 39348919 + ... + 39348940.

It is an arithmetic number, because the mean of its divisors is an integer number (236093580).

Almost surely, 2^865676449 is an apocalyptic number.

It is an amenable number.

865676449 is a deficient number, since it is larger than the sum of its proper divisors (78697871).

865676449 is a wasteful number, since it uses less digits than its factorization.

865676449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78697870.

The product of its digits is 8709120, while the sum is 55.

The square root of 865676449 is about 29422.3800702798. The cubic root of 865676449 is about 953.0562509853.

The spelling of 865676449 in words is "eight hundred sixty-five million, six hundred seventy-six thousand, four hundred forty-nine".