818019 has 10 divisors (see below), whose sum is σ = 1222100. Its totient is φ = 545292.

The previous prime is 818017. The next prime is 818021. The reversal of 818019 is 910818.

It is an interprime number because it is at equal distance from previous prime (818017) and next prime (818021).

It is not a de Polignac number, because 818019 - 2¹ = 818017 is a prime.

It is a super-2 number, since 2×818019² = 1338310168722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

818019 is a modest number, since divided by 8019 gives 81 as remainder.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 817983 and 818001.

It is not an unprimeable number, because it can be changed into a prime (818011) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4969 + ... + 5130.

It is an arithmetic number, because the mean of its divisors is an integer number (122210).

2⁸¹⁸⁰¹⁹ is an apocalyptic number.

818019 is a deficient number, since it is larger than the sum of its proper divisors (404081).

818019 is a wasteful number, since it uses less digits than its factorization.

818019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111 (or 10102 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 818019 is about 904.4440281189. Note that the first 3 decimals coincide. The cubic root of 818019 is about 93.5235816105.

It can be divided in two parts, 81801 and 9, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 818019 in words is "eight hundred eighteen thousand, nineteen".