68857737 has 16 divisors (see below), whose sum is σ = 101286528. Its totient is φ = 41339520.

The previous prime is 68857721. The next prime is 68857739. The reversal of 68857737 is 73775886.

It is not a de Polignac number, because 68857737 - 2⁴ = 68857721 is a prime.

It is a super-2 number, since 2×68857737² = 9482775889522338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68857737.

It is not an unprimeable number, because it can be changed into a prime (68857739) 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, 19933 + ... + 23130.

It is an arithmetic number, because the mean of its divisors is an integer number (6330408).

Almost surely, 2^68857737 is an apocalyptic number.

It is an amenable number.

68857737 is a deficient number, since it is larger than the sum of its proper divisors (32428791).

68857737 is a wasteful number, since it uses less digits than its factorization.

68857737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43120.

The product of its digits is 1975680, while the sum is 51.

The square root of 68857737 is about 8298.0562181754. The cubic root of 68857737 is about 409.8745144430.

The spelling of 68857737 in words is "sixty-eight million, eight hundred fifty-seven thousand, seven hundred thirty-seven".