68413517 has 2 divisors, whose sum is σ = 68413518. Its totient is φ = 68413516.

The previous prime is 68413507. The next prime is 68413519. The reversal of 68413517 is 71531486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34703881 + 33709636 = 5891^2 + 5806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68413517 is a prime.

Together with 68413519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68413519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34206758 + 34206759.

It is an arithmetic number, because the mean of its divisors is an integer number (34206759).

Almost surely, 2^68413517 is an apocalyptic number.

It is an amenable number.

68413517 is a deficient number, since it is larger than the sum of its proper divisors (1).

68413517 is an equidigital number, since it uses as much as digits as its factorization.

68413517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 68413517 is about 8271.2463994249. The cubic root of 68413517 is about 408.9912082168.

The spelling of 68413517 in words is "sixty-eight million, four hundred thirteen thousand, five hundred seventeen".