68857137 has 12 divisors (see below), whose sum is σ = 100221264. Its totient is φ = 45553560.

The previous prime is 68857133. The next prime is 68857141. The reversal of 68857137 is 73175886.

It is an interprime number because it is at equal distance from previous prime (68857133) and next prime (68857141).

It is not a de Polignac number, because 68857137 - 2² = 68857133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68857092 and 68857101.

It is not an unprimeable number, because it can be changed into a prime (68857133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28023 + ... + 30380.

It is an arithmetic number, because the mean of its divisors is an integer number (8351772).

Almost surely, 2^68857137 is an apocalyptic number.

It is an amenable number.

68857137 is a deficient number, since it is larger than the sum of its proper divisors (31364127).

68857137 is a wasteful number, since it uses less digits than its factorization.

68857137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58540 (or 58537 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 68857137 is about 8298.0200650517. The cubic root of 68857137 is about 409.8733239430.

The spelling of 68857137 in words is "sixty-eight million, eight hundred fifty-seven thousand, one hundred thirty-seven".