68857971 has 32 divisors (see below), whose sum is σ = 115153920. Its totient is φ = 35627904.

The previous prime is 68857969. The next prime is 68857991. The reversal of 68857971 is 17975886.

It is not a de Polignac number, because 68857971 - 2¹ = 68857969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68857931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12090 + ... + 16848.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^68857971 is an apocalyptic number.

68857971 is a deficient number, since it is larger than the sum of its proper divisors (46295949).

68857971 is a wasteful number, since it uses less digits than its factorization.

68857971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835.

The product of its digits is 846720, while the sum is 51.

The square root of 68857971 is about 8298.0703178510. The cubic root of 68857971 is about 409.8749787362.

The spelling of 68857971 in words is "sixty-eight million, eight hundred fifty-seven thousand, nine hundred seventy-one".