889729385 has 4 divisors (see below), whose sum is σ = 1067675268. Its totient is φ = 711783504.

The previous prime is 889729369. The next prime is 889729387. The reversal of 889729385 is 583927988.

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 269320921 + 620408464 = 16411^2 + 24908^2 .

It is a cyclic number.

It is not a de Polignac number, because 889729385 - 2⁴ = 889729369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (889729387) 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, 88972934 + ... + 88972943.

It is an arithmetic number, because the mean of its divisors is an integer number (266918817).

Almost surely, 2^889729385 is an apocalyptic number.

It is an amenable number.

889729385 is a deficient number, since it is larger than the sum of its proper divisors (177945883).

889729385 is a wasteful number, since it uses less digits than its factorization.

889729385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177945882.

The product of its digits is 8709120, while the sum is 59.

The square root of 889729385 is about 29828.3319178260. The cubic root of 889729385 is about 961.8026693597.

The spelling of 889729385 in words is "eight hundred eighty-nine million, seven hundred twenty-nine thousand, three hundred eighty-five".