68401787 has 2 divisors, whose sum is σ = 68401788. Its totient is φ = 68401786.

The previous prime is 68401757. The next prime is 68401799. The reversal of 68401787 is 78710486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68401787 - 2¹² = 68397691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68401757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34200893 + 34200894.

It is an arithmetic number, because the mean of its divisors is an integer number (34200894).

Almost surely, 2^68401787 is an apocalyptic number.

68401787 is a deficient number, since it is larger than the sum of its proper divisors (1).

68401787 is an equidigital number, since it uses as much as digits as its factorization.

68401787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 68401787 is about 8270.5372860534. The cubic root of 68401787 is about 408.9678320319.

The spelling of 68401787 in words is "sixty-eight million, four hundred one thousand, seven hundred eighty-seven".