68681907 has 12 divisors (see below), whose sum is σ = 113379760. Its totient is φ = 39246768.

The previous prime is 68681891. The next prime is 68681911. The reversal of 68681907 is 70918686.

It is a happy number.

It is not a de Polignac number, because 68681907 - 2⁴ = 68681891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68681927) 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, 545032 + ... + 545157.

Almost surely, 2^68681907 is an apocalyptic number.

68681907 is a deficient number, since it is larger than the sum of its proper divisors (44697853).

68681907 is a wasteful number, since it uses less digits than its factorization.

68681907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090202 (or 1090199 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 68681907 is about 8287.4547962568. The cubic root of 68681907 is about 409.5253420339.

The spelling of 68681907 in words is "sixty-eight million, six hundred eighty-one thousand, nine hundred seven".