818089049 has 4 divisors (see below), whose sum is σ = 822609060. Its totient is φ = 813569040.

The previous prime is 818089037. The next prime is 818089057. The reversal of 818089049 is 940980818.

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 337383424 + 480705625 = 18368^2 + 21925^2 .

It is a cyclic number.

It is not a de Polignac number, because 818089049 - 2⁸ = 818088793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 818088994 and 818089012.

It is not an unprimeable number, because it can be changed into a prime (818089009) 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, 2259734 + ... + 2260095.

It is an arithmetic number, because the mean of its divisors is an integer number (205652265).

Almost surely, 2^818089049 is an apocalyptic number.

It is an amenable number.

818089049 is a deficient number, since it is larger than the sum of its proper divisors (4520011).

818089049 is a wasteful number, since it uses less digits than its factorization.

818089049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520010.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 818089049 is about 28602.2560124197. The cubic root of 818089049 is about 935.2625108654.

The spelling of 818089049 in words is "eight hundred eighteen million, eighty-nine thousand, forty-nine".