68644787 has 2 divisors, whose sum is σ = 68644788. Its totient is φ = 68644786.

The previous prime is 68644661. The next prime is 68644799. The reversal of 68644787 is 78744686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68644787 - 2²⁶ = 1535923 is a prime.

It is not a weakly prime, because it can be changed into another prime (68644987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34322393 + 34322394.

It is an arithmetic number, because the mean of its divisors is an integer number (34322394).

Almost surely, 2^68644787 is an apocalyptic number.

68644787 is a deficient number, since it is larger than the sum of its proper divisors (1).

68644787 is an equidigital number, since it uses as much as digits as its factorization.

68644787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 50.

The square root of 68644787 is about 8285.2149640187. The cubic root of 68644787 is about 409.4515510322.

The spelling of 68644787 in words is "sixty-eight million, six hundred forty-four thousand, seven hundred eighty-seven".