859660449 has 4 divisors (see below), whose sum is σ = 1146213936. Its totient is φ = 573106964.

The previous prime is 859660421. The next prime is 859660457. The reversal of 859660449 is 944066958.

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 859660449 - 2¹² = 859656353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (859660499) 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, 143276739 + ... + 143276744.

It is an arithmetic number, because the mean of its divisors is an integer number (286553484).

Almost surely, 2^859660449 is an apocalyptic number.

It is an amenable number.

859660449 is a deficient number, since it is larger than the sum of its proper divisors (286553487).

859660449 is a wasteful number, since it uses less digits than its factorization.

859660449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286553486.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 859660449 is about 29319.9667291762. The cubic root of 859660449 is about 950.8433688929.

The spelling of 859660449 in words is "eight hundred fifty-nine million, six hundred sixty thousand, four hundred forty-nine".