68209136 has 20 divisors (see below), whose sum is σ = 132376200. Its totient is φ = 34047552.

The previous prime is 68209129. The next prime is 68209159. The reversal of 68209136 is 63190286.

It is a junction number, because it is equal to n+sod(n) for n = 68209096 and 68209105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7310 + ... + 13778.

It is an arithmetic number, because the mean of its divisors is an integer number (6618810).

Almost surely, 2^68209136 is an apocalyptic number.

It is an amenable number.

68209136 is a deficient number, since it is larger than the sum of its proper divisors (64167064).

68209136 is a wasteful number, since it uses less digits than its factorization.

68209136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136 (or 7130 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 68209136 is about 8258.8822488276. The cubic root of 68209136 is about 408.5835236238.

The spelling of 68209136 in words is "sixty-eight million, two hundred nine thousand, one hundred thirty-six".