1217418473 has 4 divisors (see below), whose sum is σ = 1224455748. Its totient is φ = 1210381200.

The previous prime is 1217418457. The next prime is 1217418539. The reversal of 1217418473 is 3748147121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3748147121 = 53 ⋅70719757.

It can be written as a sum of positive squares in 2 ways, for example, as 942919849 + 274498624 = 30707^2 + 16568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217418473 - 2⁴ = 1217418457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217418413) 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, 3518378 + ... + 3518723.

It is an arithmetic number, because the mean of its divisors is an integer number (306113937).

Almost surely, 2^1217418473 is an apocalyptic number.

It is an amenable number.

1217418473 is a deficient number, since it is larger than the sum of its proper divisors (7037275).

1217418473 is an equidigital number, since it uses as much as digits as its factorization.

1217418473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037274.

The product of its digits is 37632, while the sum is 38.

The square root of 1217418473 is about 34891.5243719732. The cubic root of 1217418473 is about 1067.7755262519.

The spelling of 1217418473 in words is "one billion, two hundred seventeen million, four hundred eighteen thousand, four hundred seventy-three".