68707457 has 18 divisors (see below), whose sum is σ = 86556438. Its totient is φ = 54355392.

The previous prime is 68707453. The next prime is 68707511. The reversal of 68707457 is 75470786.

It can be written as a sum of positive squares in 3 ways, for example, as 8116801 + 60590656 = 2849^2 + 7784^2 .

It is not a de Polignac number, because 68707457 - 2² = 68707453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68707453) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4133 + ... + 12429.

It is an arithmetic number, because the mean of its divisors is an integer number (4808691).

Almost surely, 2^68707457 is an apocalyptic number.

It is an amenable number.

68707457 is a deficient number, since it is larger than the sum of its proper divisors (17848981).

68707457 is a wasteful number, since it uses less digits than its factorization.

68707457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337 (or 8317 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 68707457 is about 8288.9961394610. The cubic root of 68707457 is about 409.5761175377.

The spelling of 68707457 in words is "sixty-eight million, seven hundred seven thousand, four hundred fifty-seven".