818738841 has 4 divisors (see below), whose sum is σ = 1091651792. Its totient is φ = 545825892.

The previous prime is 818738831. The next prime is 818738903. The reversal of 818738841 is 148837818.

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 not a de Polignac number, because 818738841 - 2⁶ = 818738777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (818738821) 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, 136456471 + ... + 136456476.

It is an arithmetic number, because the mean of its divisors is an integer number (272912948).

Almost surely, 2^818738841 is an apocalyptic number.

It is an amenable number.

818738841 is a deficient number, since it is larger than the sum of its proper divisors (272912951).

818738841 is a wasteful number, since it uses less digits than its factorization.

818738841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272912950.

The product of its digits is 344064, while the sum is 48.

The square root of 818738841 is about 28613.6128617132. The cubic root of 818738841 is about 935.5100655244.

The spelling of 818738841 in words is "eight hundred eighteen million, seven hundred thirty-eight thousand, eight hundred forty-one".