818441387 has 4 divisors (see below), whose sum is σ = 866585016. Its totient is φ = 770297760.

The previous prime is 818441341. The next prime is 818441389. The reversal of 818441387 is 783144818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783144818 = 2 ⋅391572409.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818441387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818441389) 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, 24071789 + ... + 24071822.

It is an arithmetic number, because the mean of its divisors is an integer number (216646254).

Almost surely, 2^818441387 is an apocalyptic number.

818441387 is a deficient number, since it is larger than the sum of its proper divisors (48143629).

818441387 is a wasteful number, since it uses less digits than its factorization.

818441387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48143628.

The product of its digits is 172032, while the sum is 44.

The square root of 818441387 is about 28608.4146187796. The cubic root of 818441387 is about 935.3967591793.

The spelling of 818441387 in words is "eight hundred eighteen million, four hundred forty-one thousand, three hundred eighty-seven".