68067909 has 72 divisors (see below), whose sum is σ = 127475712. Its totient is φ = 34655040.

The previous prime is 68067871. The next prime is 68067911. The reversal of 68067909 is 90976086.

It is not a de Polignac number, because 68067909 - 2⁷ = 68067781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68067919) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 177532 + ... + 177914.

It is an arithmetic number, because the mean of its divisors is an integer number (1770496).

Almost surely, 2^68067909 is an apocalyptic number.

It is an amenable number.

68067909 is a deficient number, since it is larger than the sum of its proper divisors (59407803).

68067909 is a wasteful number, since it uses less digits than its factorization.

68067909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 68067909 is about 8250.3278116691. The cubic root of 68067909 is about 408.3013380826.

The spelling of 68067909 in words is "sixty-eight million, sixty-seven thousand, nine hundred nine".