1217175013 has 4 divisors (see below), whose sum is σ = 1218984268. Its totient is φ = 1215365760.

The previous prime is 1217174971. The next prime is 1217175049. The reversal of 1217175013 is 3105717121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 203262049 + 1013912964 = 14257^2 + 31842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217175013 - 2²¹ = 1215077861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217170013) 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, 903618 + ... + 904963.

It is an arithmetic number, because the mean of its divisors is an integer number (304746067).

Almost surely, 2^1217175013 is an apocalyptic number.

It is an amenable number.

1217175013 is a deficient number, since it is larger than the sum of its proper divisors (1809255).

1217175013 is an equidigital number, since it uses as much as digits as its factorization.

1217175013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809254.

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 1217175013 is about 34888.0353846415. The cubic root of 1217175013 is about 1067.7043433989.

The spelling of 1217175013 in words is "one billion, two hundred seventeen million, one hundred seventy-five thousand, thirteen".