68280829 has 4 divisors (see below), whose sum is σ = 68329276. Its totient is φ = 68232384.

The previous prime is 68280811. The next prime is 68280833. The reversal of 68280829 is 92808286.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35676729 + 32604100 = 5973^2 + 5710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68280829 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 (68280869) 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, 22044 + ... + 24949.

It is an arithmetic number, because the mean of its divisors is an integer number (17082319).

Almost surely, 2^68280829 is an apocalyptic number.

It is an amenable number.

68280829 is a deficient number, since it is larger than the sum of its proper divisors (48447).

68280829 is a wasteful number, since it uses less digits than its factorization.

68280829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48446.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 68280829 is about 8263.2214662322. The cubic root of 68280829 is about 408.7266243058.

The spelling of 68280829 in words is "sixty-eight million, two hundred eighty thousand, eight hundred twenty-nine".