849678889 has 4 divisors (see below), whose sum is σ = 850016080. Its totient is φ = 849341700.

The previous prime is 849678829. The next prime is 849678919. The reversal of 849678889 is 988876948.

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 849678889 - 2¹³ = 849670697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849678829) 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, 164787 + ... + 169864.

It is an arithmetic number, because the mean of its divisors is an integer number (212504020).

Almost surely, 2^849678889 is an apocalyptic number.

It is an amenable number.

849678889 is a deficient number, since it is larger than the sum of its proper divisors (337191).

849678889 is a wasteful number, since it uses less digits than its factorization.

849678889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337190.

The product of its digits is 55738368, while the sum is 67.

The square root of 849678889 is about 29149.2519458047. The cubic root of 849678889 is about 947.1489365730.

The spelling of 849678889 in words is "eight hundred forty-nine million, six hundred seventy-eight thousand, eight hundred eighty-nine".