68129906 has 16 divisors (see below), whose sum is σ = 110678400. Its totient is φ = 31266768.

The previous prime is 68129869. The next prime is 68129917. The reversal of 68129906 is 60992186.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (6917400).

Almost surely, 2^68129906 is an apocalyptic number.

68129906 is a deficient number, since it is larger than the sum of its proper divisors (42548494).

68129906 is a wasteful number, since it uses less digits than its factorization.

68129906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14833.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 68129906 is about 8254.0842011697. The cubic root of 68129906 is about 408.4252622492.

The spelling of 68129906 in words is "sixty-eight million, one hundred twenty-nine thousand, nine hundred six".