68764387 has 2 divisors, whose sum is σ = 68764388. Its totient is φ = 68764386.

The previous prime is 68764379. The next prime is 68764391. The reversal of 68764387 is 78346786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68764387 - 2³ = 68764379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68764387.

It is not a weakly prime, because it can be changed into another prime (68764327) 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, 34382193 + 34382194.

It is an arithmetic number, because the mean of its divisors is an integer number (34382194).

Almost surely, 2^68764387 is an apocalyptic number.

68764387 is a deficient number, since it is larger than the sum of its proper divisors (1).

68764387 is an equidigital number, since it uses as much as digits as its factorization.

68764387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 49.

The square root of 68764387 is about 8292.4294992481. The cubic root of 68764387 is about 409.6892092469.

The spelling of 68764387 in words is "sixty-eight million, seven hundred sixty-four thousand, three hundred eighty-seven".