1213072717 has 2 divisors, whose sum is σ = 1213072718. Its totient is φ = 1213072716.

The previous prime is 1213072711. The next prime is 1213072733. The reversal of 1213072717 is 7172703121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1078071556 + 135001161 = 32834^2 + 11619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213072717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213072711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606536358 + 606536359.

It is an arithmetic number, because the mean of its divisors is an integer number (606536359).

Almost surely, 2^1213072717 is an apocalyptic number.

It is an amenable number.

1213072717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213072717 is an equidigital number, since it uses as much as digits as its factorization.

1213072717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 1213072717 is about 34829.1934589361. The cubic root of 1213072717 is about 1066.5034837066.

Adding to 1213072717 its reverse (7172703121), we get a palindrome (8385775838).

The spelling of 1213072717 in words is "one billion, two hundred thirteen million, seventy-two thousand, seven hundred seventeen".