68826881 has 4 divisors (see below), whose sum is σ = 69022212. Its totient is φ = 68631552.

The previous prime is 68826871. The next prime is 68826883. The reversal of 68826881 is 18862886.

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 43020481 + 25806400 = 6559^2 + 5080^2 .

It is a cyclic number.

It is not a de Polignac number, because 68826881 - 2¹⁰ = 68825857 is a prime.

It is a super-2 number, since 2×68826881² = 9474279096376322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68826883) 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, 97136 + ... + 97841.

It is an arithmetic number, because the mean of its divisors is an integer number (17255553).

Almost surely, 2^68826881 is an apocalyptic number.

It is an amenable number.

68826881 is a deficient number, since it is larger than the sum of its proper divisors (195331).

68826881 is a wasteful number, since it uses less digits than its factorization.

68826881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195330.

The product of its digits is 294912, while the sum is 47.

The square root of 68826881 is about 8296.1967792477. The cubic root of 68826881 is about 409.8132820232.

The spelling of 68826881 in words is "sixty-eight million, eight hundred twenty-six thousand, eight hundred eighty-one".