1217575493 has 2 divisors, whose sum is σ = 1217575494. Its totient is φ = 1217575492.

The previous prime is 1217575481. The next prime is 1217575511. The reversal of 1217575493 is 3945757121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865712929 + 351862564 = 29423^2 + 18758^2 .

It is an emirp because it is prime and its reverse (3945757121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217575493 - 2⁴ = 1217575477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217575193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608787746 + 608787747.

It is an arithmetic number, because the mean of its divisors is an integer number (608787747).

Almost surely, 2^1217575493 is an apocalyptic number.

It is an amenable number.

1217575493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217575493 is an equidigital number, since it uses as much as digits as its factorization.

1217575493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The square root of 1217575493 is about 34893.7744160760. The cubic root of 1217575493 is about 1067.8214307373.

The spelling of 1217575493 in words is "one billion, two hundred seventeen million, five hundred seventy-five thousand, four hundred ninety-three".