1814647493 has 2 divisors, whose sum is σ = 1814647494. Its totient is φ = 1814647492.

The previous prime is 1814647481. The next prime is 1814647543. The reversal of 1814647493 is 3947464181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1559223169 + 255424324 = 39487^2 + 15982^2 .

It is an emirp because it is prime and its reverse (3947464181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1814647493 - 2¹⁰ = 1814646469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1814647423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907323746 + 907323747.

It is an arithmetic number, because the mean of its divisors is an integer number (907323747).

Almost surely, 2^1814647493 is an apocalyptic number.

It is an amenable number.

1814647493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1814647493 is an equidigital number, since it uses as much as digits as its factorization.

1814647493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 1814647493 is about 42598.6794748382. The cubic root of 1814647493 is about 1219.7310822225.

The spelling of 1814647493 in words is "one billion, eight hundred fourteen million, six hundred forty-seven thousand, four hundred ninety-three".