68307657 has 8 divisors (see below), whose sum is σ = 99356640. Its totient is φ = 41398560.

The previous prime is 68307571. The next prime is 68307689. The reversal of 68307657 is 75670386.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68307657 - 2⁷ = 68307529 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68307697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034932 + ... + 1034997.

It is an arithmetic number, because the mean of its divisors is an integer number (12419580).

Almost surely, 2^68307657 is an apocalyptic number.

It is an amenable number.

68307657 is a deficient number, since it is larger than the sum of its proper divisors (31048983).

68307657 is a wasteful number, since it uses less digits than its factorization.

68307657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069943.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 68307657 is about 8264.8446446379. The cubic root of 68307657 is about 408.7801477824.

The spelling of 68307657 in words is "sixty-eight million, three hundred seven thousand, six hundred fifty-seven".