1818713 has 4 divisors (see below), whose sum is σ = 1958628. Its totient is φ = 1678800.

The previous prime is 1818703. The next prime is 1818721. The reversal of 1818713 is 3178181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3178181 = 977 ⋅3253.

It can be written as a sum of positive squares in 2 ways, for example, as 1236544 + 582169 = 1112^2 + 763^2 .

It is a cyclic number.

It is not a de Polignac number, because 1818713 - 2⁸ = 1818457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818703) 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, 69938 + ... + 69963.

It is an arithmetic number, because the mean of its divisors is an integer number (489657).

2^1818713 is an apocalyptic number.

1818713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1818713 is a deficient number, since it is larger than the sum of its proper divisors (139915).

1818713 is a wasteful number, since it uses less digits than its factorization.

1818713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139914.

The product of its digits is 1344, while the sum is 29.

The square root of 1818713 is about 1348.5966780324. The cubic root of 1818713 is about 122.0641291441.

The spelling of 1818713 in words is "one million, eight hundred eighteen thousand, seven hundred thirteen".