68415887 has 2 divisors, whose sum is σ = 68415888. Its totient is φ = 68415886.

The previous prime is 68415877. The next prime is 68415889. The reversal of 68415887 is 78851486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68415887 - 2⁸ = 68415631 is a prime.

Together with 68415889, 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 (68415889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34207943 + 34207944.

It is an arithmetic number, because the mean of its divisors is an integer number (34207944).

Almost surely, 2^68415887 is an apocalyptic number.

68415887 is a deficient number, since it is larger than the sum of its proper divisors (1).

68415887 is an equidigital number, since it uses as much as digits as its factorization.

68415887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 47.

The square root of 68415887 is about 8271.3896655882. The cubic root of 68415887 is about 408.9959309579.

The spelling of 68415887 in words is "sixty-eight million, four hundred fifteen thousand, eight hundred eighty-seven".