68261587 has 2 divisors, whose sum is σ = 68261588. Its totient is φ = 68261586.

The previous prime is 68261569. The next prime is 68261593. The reversal of 68261587 is 78516286.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68261587 is a prime.

It is not a weakly prime, because it can be changed into another prime (68261527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34130793 + 34130794.

It is an arithmetic number, because the mean of its divisors is an integer number (34130794).

Almost surely, 2^68261587 is an apocalyptic number.

68261587 is a deficient number, since it is larger than the sum of its proper divisors (1).

68261587 is an equidigital number, since it uses as much as digits as its factorization.

68261587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 68261587 is about 8262.0570683093. The cubic root of 68261587 is about 408.6882267218.

The spelling of 68261587 in words is "sixty-eight million, two hundred sixty-one thousand, five hundred eighty-seven".