68369281 has 4 divisors (see below), whose sum is σ = 68429232. Its totient is φ = 68309332.

The previous prime is 68369251. The next prime is 68369321. The reversal of 68369281 is 18296386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68369281 - 2²⁵ = 34814849 is a prime.

It is a super-2 number, since 2×68369281² = 9348717168913922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68369251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28231 + ... + 30556.

It is an arithmetic number, because the mean of its divisors is an integer number (17107308).

Almost surely, 2^68369281 is an apocalyptic number.

It is an amenable number.

68369281 is a deficient number, since it is larger than the sum of its proper divisors (59951).

68369281 is a wasteful number, since it uses less digits than its factorization.

68369281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59950.

The product of its digits is 124416, while the sum is 43.

The square root of 68369281 is about 8268.5718839471. The cubic root of 68369281 is about 408.9030383311.

The spelling of 68369281 in words is "sixty-eight million, three hundred sixty-nine thousand, two hundred eighty-one".