68839257 has 16 divisors (see below), whose sum is σ = 94279680. Its totient is φ = 44662800.

The previous prime is 68839231. The next prime is 68839279. The reversal of 68839257 is 75293886.

It is not a de Polignac number, because 68839257 - 2⁶ = 68839193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68839297) 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 15 ways as a sum of consecutive naturals, for example, 14782 + ... + 18872.

It is an arithmetic number, because the mean of its divisors is an integer number (5892480).

Almost surely, 2^68839257 is an apocalyptic number.

It is an amenable number.

68839257 is a deficient number, since it is larger than the sum of its proper divisors (25440423).

68839257 is a wasteful number, since it uses less digits than its factorization.

68839257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244.

The product of its digits is 725760, while the sum is 48.

The square root of 68839257 is about 8296.9426296679. The cubic root of 68839257 is about 409.8378438665.

It can be divided in two parts, 68839 and 257, that added together give a palindrome (69096).

The spelling of 68839257 in words is "sixty-eight million, eight hundred thirty-nine thousand, two hundred fifty-seven".