68785279 has 4 divisors (see below), whose sum is σ = 69053184. Its totient is φ = 68517376.

The previous prime is 68785273. The next prime is 68785289. The reversal of 68785279 is 97258786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68785279 - 2⁹ = 68784767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68785273) 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, 133567 + ... + 134080.

It is an arithmetic number, because the mean of its divisors is an integer number (17263296).

Almost surely, 2^68785279 is an apocalyptic number.

68785279 is a deficient number, since it is larger than the sum of its proper divisors (267905).

68785279 is a wasteful number, since it uses less digits than its factorization.

68785279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267904.

The product of its digits is 1693440, while the sum is 52.

The square root of 68785279 is about 8293.6891067847. The cubic root of 68785279 is about 409.7306956454.

The spelling of 68785279 in words is "sixty-eight million, seven hundred eighty-five thousand, two hundred seventy-nine".