68821311 has 16 divisors (see below), whose sum is σ = 99348480. Its totient is φ = 42125280.

The previous prime is 68821309. The next prime is 68821327. The reversal of 68821311 is 11312886.

It is not a de Polignac number, because 68821311 - 2¹ = 68821309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68821391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2830 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (6209280).

Almost surely, 2^68821311 is an apocalyptic number.

68821311 is a deficient number, since it is larger than the sum of its proper divisors (30527169).

68821311 is a wasteful number, since it uses less digits than its factorization.

68821311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446.

The product of its digits is 2304, while the sum is 30.

The square root of 68821311 is about 8295.8610764646. The cubic root of 68821311 is about 409.8022266451.

The spelling of 68821311 in words is "sixty-eight million, eight hundred twenty-one thousand, three hundred eleven".