68408887 has 2 divisors, whose sum is σ = 68408888. Its totient is φ = 68408886.

The previous prime is 68408881. The next prime is 68408891. The reversal of 68408887 is 78880486.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68408887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68408887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68408881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34204443 + 34204444.

It is an arithmetic number, because the mean of its divisors is an integer number (34204444).

Almost surely, 2^68408887 is an apocalyptic number.

68408887 is a deficient number, since it is larger than the sum of its proper divisors (1).

68408887 is an equidigital number, since it uses as much as digits as its factorization.

68408887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 688128, while the sum is 49.

The square root of 68408887 is about 8270.9665094232. The cubic root of 68408887 is about 408.9819816190.

The spelling of 68408887 in words is "sixty-eight million, four hundred eight thousand, eight hundred eighty-seven".