1217310629 has 2 divisors, whose sum is σ = 1217310630. Its totient is φ = 1217310628.

The previous prime is 1217310617. The next prime is 1217310631. The reversal of 1217310629 is 9260137121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991620100 + 225690529 = 31490^2 + 15023^2 .

It is an emirp because it is prime and its reverse (9260137121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217310629 - 2¹⁶ = 1217245093 is a prime.

Together with 1217310631, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1217310595 and 1217310604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217310649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608655314 + 608655315.

It is an arithmetic number, because the mean of its divisors is an integer number (608655315).

Almost surely, 2^1217310629 is an apocalyptic number.

It is an amenable number.

1217310629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217310629 is an equidigital number, since it uses as much as digits as its factorization.

1217310629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1217310629 is about 34889.9789194548. The cubic root of 1217310629 is about 1067.7439959861.

The spelling of 1217310629 in words is "one billion, two hundred seventeen million, three hundred ten thousand, six hundred twenty-nine".