68245857 has 6 divisors (see below), whose sum is σ = 98577362. Its totient is φ = 45497232.

The previous prime is 68245847. The next prime is 68245861. The reversal of 68245857 is 75854286.

68245857 is a `hidden beast` number, since 68 + 2 + 4 + 585 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67914081 + 331776 = 8241^2 + 576^2 .

It is not a de Polignac number, because 68245857 - 2⁴ = 68245841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68245817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3791428 + ... + 3791445.

Almost surely, 2^68245857 is an apocalyptic number.

It is an amenable number.

68245857 is a deficient number, since it is larger than the sum of its proper divisors (30331505).

68245857 is a wasteful number, since it uses less digits than its factorization.

68245857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7582879 (or 7582876 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 68245857 is about 8261.1050713570. The cubic root of 68245857 is about 408.6568320045.

The spelling of 68245857 in words is "sixty-eight million, two hundred forty-five thousand, eight hundred fifty-seven".