1812464917 has 2 divisors, whose sum is σ = 1812464918. Its totient is φ = 1812464916.

The previous prime is 1812464867. The next prime is 1812464923. The reversal of 1812464917 is 7194642181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1652341201 + 160123716 = 40649^2 + 12654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812464917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812464957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906232458 + 906232459.

It is an arithmetic number, because the mean of its divisors is an integer number (906232459).

Almost surely, 2^1812464917 is an apocalyptic number.

It is an amenable number.

1812464917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812464917 is an equidigital number, since it uses as much as digits as its factorization.

1812464917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 1812464917 is about 42573.0538838829. The cubic root of 1812464917 is about 1219.2418735622.

The spelling of 1812464917 in words is "one billion, eight hundred twelve million, four hundred sixty-four thousand, nine hundred seventeen".