68781369 has 4 divisors (see below), whose sum is σ = 91708496. Its totient is φ = 45854244.

The previous prime is 68781347. The next prime is 68781379. The reversal of 68781369 is 96318786.

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 not a de Polignac number, because 68781369 - 2¹² = 68777273 is a prime.

It is a super-2 number, since 2×68781369² = 9461753443028322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68781379) 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, 11463559 + ... + 11463564.

It is an arithmetic number, because the mean of its divisors is an integer number (22927124).

Almost surely, 2^68781369 is an apocalyptic number.

It is an amenable number.

68781369 is a deficient number, since it is larger than the sum of its proper divisors (22927127).

68781369 is a wasteful number, since it uses less digits than its factorization.

68781369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22927126.

The product of its digits is 435456, while the sum is 48.

The square root of 68781369 is about 8293.4533820357. The cubic root of 68781369 is about 409.7229319814.

The spelling of 68781369 in words is "sixty-eight million, seven hundred eighty-one thousand, three hundred sixty-nine".