1307907217 has 2 divisors, whose sum is σ = 1307907218. Its totient is φ = 1307907216.

The previous prime is 1307907197. The next prime is 1307907229. The reversal of 1307907217 is 7127097031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968205456 + 339701761 = 31116^2 + 18431^2 .

It is an emirp because it is prime and its reverse (7127097031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1307907217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1307907817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653953608 + 653953609.

It is an arithmetic number, because the mean of its divisors is an integer number (653953609).

Almost surely, 2^1307907217 is an apocalyptic number.

It is an amenable number.

1307907217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307907217 is an equidigital number, since it uses as much as digits as its factorization.

1307907217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 37.

The square root of 1307907217 is about 36164.9998893958. Note that the first 3 decimals coincide. The cubic root of 1307907217 is about 1093.6012015831.

The spelling of 1307907217 in words is "one billion, three hundred seven million, nine hundred seven thousand, two hundred seventeen".