818743849 has 8 divisors (see below), whose sum is σ = 1020771648. Its totient is φ = 637982160.

The previous prime is 818743829. The next prime is 818743889. The reversal of 818743849 is 948347818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 818743849 - 2⁷ = 818743721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 818743796 and 818743805.

It is not an unprimeable number, because it can be changed into a prime (818743829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5316442 + ... + 5316595.

It is an arithmetic number, because the mean of its divisors is an integer number (127596456).

Almost surely, 2^818743849 is an apocalyptic number.

It is an amenable number.

818743849 is a deficient number, since it is larger than the sum of its proper divisors (202027799).

818743849 is a wasteful number, since it uses less digits than its factorization.

818743849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10633055.

The product of its digits is 1548288, while the sum is 52.

The square root of 818743849 is about 28613.7003723741. The cubic root of 818743849 is about 935.5119729397.

It can be divided in two parts, 81 and 8743849, that multiplied together give a square (708251769 = 26613²).

The spelling of 818743849 in words is "eight hundred eighteen million, seven hundred forty-three thousand, eight hundred forty-nine".