68781787 has 8 divisors (see below), whose sum is σ = 70459200. Its totient is φ = 67121544.

The previous prime is 68781773. The next prime is 68781793. The reversal of 68781787 is 78718786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68781787 - 2¹⁵ = 68749019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68781737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4008 + ... + 12394.

It is an arithmetic number, because the mean of its divisors is an integer number (8807400).

Almost surely, 2^68781787 is an apocalyptic number.

68781787 is a deficient number, since it is larger than the sum of its proper divisors (1677413).

68781787 is a wasteful number, since it uses less digits than its factorization.

68781787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585.

The product of its digits is 1053696, while the sum is 52.

The square root of 68781787 is about 8293.4785825973. The cubic root of 68781787 is about 409.7237619729.

The spelling of 68781787 in words is "sixty-eight million, seven hundred eighty-one thousand, seven hundred eighty-seven".