68785257 has 8 divisors (see below), whose sum is σ = 94192576. Its totient is φ = 44617392.

The previous prime is 68785237. The next prime is 68785259. The reversal of 68785257 is 75258786.

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

It is not a de Polignac number, because 68785257 - 2²⁶ = 1676393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68785259) 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 in 7 ways as a sum of consecutive naturals, for example, 309733 + ... + 309954.

It is an arithmetic number, because the mean of its divisors is an integer number (11774072).

Almost surely, 2^68785257 is an apocalyptic number.

It is an amenable number.

68785257 is a deficient number, since it is larger than the sum of its proper divisors (25407319).

68785257 is a wasteful number, since it uses less digits than its factorization.

68785257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619727.

The product of its digits is 940800, while the sum is 48.

The square root of 68785257 is about 8293.6877804750. The cubic root of 68785257 is about 409.7306519632.

The spelling of 68785257 in words is "sixty-eight million, seven hundred eighty-five thousand, two hundred fifty-seven".