68290517 has 2 divisors, whose sum is σ = 68290518. Its totient is φ = 68290516.

The previous prime is 68290499. The next prime is 68290529. The reversal of 68290517 is 71509286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 3632836 = 8041^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 68290517 - 2¹⁴ = 68274133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68293517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34145258 + 34145259.

It is an arithmetic number, because the mean of its divisors is an integer number (34145259).

Almost surely, 2^68290517 is an apocalyptic number.

It is an amenable number.

68290517 is a deficient number, since it is larger than the sum of its proper divisors (1).

68290517 is an equidigital number, since it uses as much as digits as its factorization.

68290517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 68290517 is about 8263.8076574906. The cubic root of 68290517 is about 408.7459540666.

The spelling of 68290517 in words is "sixty-eight million, two hundred ninety thousand, five hundred seventeen".