68851209 has 8 divisors (see below), whose sum is σ = 104916160. Its totient is φ = 39343536.

The previous prime is 68851169. The next prime is 68851219. The reversal of 68851209 is 90215886.

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

It is not a de Polignac number, because 68851209 - 2⁸ = 68850953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68851219) 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, 1639294 + ... + 1639335.

It is an arithmetic number, because the mean of its divisors is an integer number (13114520).

Almost surely, 2^68851209 is an apocalyptic number.

It is an amenable number.

68851209 is a deficient number, since it is larger than the sum of its proper divisors (36064951).

68851209 is a wasteful number, since it uses less digits than its factorization.

68851209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278639.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 68851209 is about 8297.6628637225. The cubic root of 68851209 is about 409.8615614305.

The spelling of 68851209 in words is "sixty-eight million, eight hundred fifty-one thousand, two hundred nine".