1217870473 has 2 divisors, whose sum is σ = 1217870474. Its totient is φ = 1217870472.

The previous prime is 1217870449. The next prime is 1217870501. The reversal of 1217870473 is 3740787121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 795691264 + 422179209 = 28208^2 + 20547^2 .

It is an emirp because it is prime and its reverse (3740787121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217870473 - 2⁵ = 1217870441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1217874473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608935236 + 608935237.

It is an arithmetic number, because the mean of its divisors is an integer number (608935237).

Almost surely, 2^1217870473 is an apocalyptic number.

It is an amenable number.

1217870473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217870473 is an equidigital number, since it uses as much as digits as its factorization.

1217870473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 1217870473 is about 34898.0009885953. Note that the first 3 decimals coincide. The cubic root of 1217870473 is about 1067.9076568847.

The spelling of 1217870473 in words is "one billion, two hundred seventeen million, eight hundred seventy thousand, four hundred seventy-three".