68540207 has 8 divisors (see below), whose sum is σ = 71647200. Its totient is φ = 65443840.

The previous prime is 68540203. The next prime is 68540221. The reversal of 68540207 is 70204586.

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

It is a cyclic number.

It is not a de Polignac number, because 68540207 - 2² = 68540203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68540203) 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, 12419 + ... + 17067.

It is an arithmetic number, because the mean of its divisors is an integer number (8955900).

Almost surely, 2^68540207 is an apocalyptic number.

68540207 is a deficient number, since it is larger than the sum of its proper divisors (3106993).

68540207 is a wasteful number, since it uses less digits than its factorization.

68540207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 68540207 is about 8278.9013159960. The cubic root of 68540207 is about 409.2435128641.

The spelling of 68540207 in words is "sixty-eight million, five hundred forty thousand, two hundred seven".