1812261713 has 4 divisors (see below), whose sum is σ = 1815894000. Its totient is φ = 1808629428.

The previous prime is 1812261691. The next prime is 1812261721. The reversal of 1812261713 is 3171622181.

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 a cyclic number.

It is not a de Polignac number, because 1812261713 - 2¹⁴ = 1812245329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1812261713.

It is not an unprimeable number, because it can be changed into a prime (1812231713) 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, 1815395 + ... + 1816392.

It is an arithmetic number, because the mean of its divisors is an integer number (453973500).

Almost surely, 2^1812261713 is an apocalyptic number.

It is an amenable number.

1812261713 is a deficient number, since it is larger than the sum of its proper divisors (3632287).

1812261713 is an equidigital number, since it uses as much as digits as its factorization.

1812261713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632286.

The product of its digits is 4032, while the sum is 32.

The square root of 1812261713 is about 42570.6672839409. The cubic root of 1812261713 is about 1219.1963068714.

Adding to 1812261713 its reverse (3171622181), we get a palindrome (4983883894).

The spelling of 1812261713 in words is "one billion, eight hundred twelve million, two hundred sixty-one thousand, seven hundred thirteen".