889778249 has 4 divisors (see below), whose sum is σ = 942118164. Its totient is φ = 837438336.

The previous prime is 889778243. The next prime is 889778287. The reversal of 889778249 is 942877988.

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

It can be written as a sum of positive squares in 2 ways, for example, as 329604025 + 560174224 = 18155^2 + 23668^2 .

It is a cyclic number.

It is not a de Polignac number, because 889778249 - 2²⁸ = 621342793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 889778191 and 889778200.

It is not an unprimeable number, because it can be changed into a prime (889778243) 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, 26169932 + ... + 26169965.

It is an arithmetic number, because the mean of its divisors is an integer number (235529541).

Almost surely, 2^889778249 is an apocalyptic number.

It is an amenable number.

889778249 is a deficient number, since it is larger than the sum of its proper divisors (52339915).

889778249 is a wasteful number, since it uses less digits than its factorization.

889778249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52339914.

The product of its digits is 16257024, while the sum is 62.

The square root of 889778249 is about 29829.1509936170. The cubic root of 889778249 is about 961.8202764606.

The spelling of 889778249 in words is "eight hundred eighty-nine million, seven hundred seventy-eight thousand, two hundred forty-nine".