849989641 has 4 divisors (see below), whose sum is σ = 872962372. Its totient is φ = 827016912.

The previous prime is 849989627. The next prime is 849989653. The reversal of 849989641 is 146989948.

It is a happy number.

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 329967225 + 520022416 = 18165^2 + 22804^2 .

It is a cyclic number.

It is not a de Polignac number, because 849989641 - 2¹³ = 849981449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849989611) 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, 11486310 + ... + 11486383.

It is an arithmetic number, because the mean of its divisors is an integer number (218240593).

Almost surely, 2^849989641 is an apocalyptic number.

It is an amenable number.

849989641 is a deficient number, since it is larger than the sum of its proper divisors (22972731).

849989641 is a wasteful number, since it uses less digits than its factorization.

849989641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22972730.

The product of its digits is 4478976, while the sum is 58.

The square root of 849989641 is about 29154.5818183009. The cubic root of 849989641 is about 947.2643890324.

The spelling of 849989641 in words is "eight hundred forty-nine million, nine hundred eighty-nine thousand, six hundred forty-one".