68538907 has 4 divisors (see below), whose sum is σ = 69145560. Its totient is φ = 67932256.

The previous prime is 68538893. The next prime is 68538937. The reversal of 68538907 is 70983586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68538907 - 2¹¹ = 68536859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68538937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303157 + ... + 303382.

It is an arithmetic number, because the mean of its divisors is an integer number (17286390).

Almost surely, 2^68538907 is an apocalyptic number.

68538907 is a deficient number, since it is larger than the sum of its proper divisors (606653).

68538907 is a wasteful number, since it uses less digits than its factorization.

68538907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606652.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 68538907 is about 8278.8228027903. The cubic root of 68538907 is about 409.2409254781.

The spelling of 68538907 in words is "sixty-eight million, five hundred thirty-eight thousand, nine hundred seven".