68143807 has 4 divisors (see below), whose sum is σ = 68409216. Its totient is φ = 67878400.

The previous prime is 68143799. The next prime is 68143813. The reversal of 68143807 is 70834186.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70834186 = 2 ⋅35417093.

It is a cyclic number.

It is not a de Polignac number, because 68143807 - 2³ = 68143799 is a prime.

It is a super-3 number, since 3×68143807³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68143897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132319 + ... + 132832.

It is an arithmetic number, because the mean of its divisors is an integer number (17102304).

Almost surely, 2^68143807 is an apocalyptic number.

68143807 is a deficient number, since it is larger than the sum of its proper divisors (265409).

68143807 is a wasteful number, since it uses less digits than its factorization.

68143807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265408.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 68143807 is about 8254.9262261997. The cubic root of 68143807 is about 408.4530382721.

The spelling of 68143807 in words is "sixty-eight million, one hundred forty-three thousand, eight hundred seven".