1217393461 has 4 divisors (see below), whose sum is σ = 1217487532. Its totient is φ = 1217299392.

The previous prime is 1217393447. The next prime is 1217393497. The reversal of 1217393461 is 1643937121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 526702500 + 690690961 = 22950^2 + 26281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217393461 - 2¹⁵ = 1217360693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217393461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217393431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23796 + ... + 54781.

It is an arithmetic number, because the mean of its divisors is an integer number (304371883).

Almost surely, 2^1217393461 is an apocalyptic number.

It is an amenable number.

1217393461 is a deficient number, since it is larger than the sum of its proper divisors (94071).

1217393461 is an equidigital number, since it uses as much as digits as its factorization.

1217393461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94070.

The product of its digits is 27216, while the sum is 37.

The square root of 1217393461 is about 34891.1659449781. The cubic root of 1217393461 is about 1067.7682136789.

The spelling of 1217393461 in words is "one billion, two hundred seventeen million, three hundred ninety-three thousand, four hundred sixty-one".