137568217 has 2 divisors, whose sum is σ = 137568218. Its totient is φ = 137568216.

The previous prime is 137568203. The next prime is 137568269. The reversal of 137568217 is 712865731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116186841 + 21381376 = 10779^2 + 4624^2 .

It is a cyclic number.

It is not a de Polignac number, because 137568217 - 2⁷ = 137568089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137568217.

It is not a weakly prime, because it can be changed into another prime (137568287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68784108 + 68784109.

It is an arithmetic number, because the mean of its divisors is an integer number (68784109).

Almost surely, 2^137568217 is an apocalyptic number.

It is an amenable number.

137568217 is a deficient number, since it is larger than the sum of its proper divisors (1).

137568217 is an equidigital number, since it uses as much as digits as its factorization.

137568217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 137568217 is about 11728.9478215226. The cubic root of 137568217 is about 516.2254000437.

The spelling of 137568217 in words is "one hundred thirty-seven million, five hundred sixty-eight thousand, two hundred seventeen".