68812819 has 16 divisors (see below), whose sum is σ = 72093600. Its totient is φ = 65640960.

The previous prime is 68812769. The next prime is 68812823. The reversal of 68812819 is 91821886.

It is a cyclic number.

It is not a de Polignac number, because 68812819 - 2²³ = 60424211 is a prime.

It is a super-2 number, since 2×68812819² = 9470408117453522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68812879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461757 + ... + 461905.

It is an arithmetic number, because the mean of its divisors is an integer number (4505850).

Almost surely, 2^68812819 is an apocalyptic number.

68812819 is a deficient number, since it is larger than the sum of its proper divisors (3280781).

68812819 is a wasteful number, since it uses less digits than its factorization.

68812819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its digits is 55296, while the sum is 43.

The square root of 68812819 is about 8295.3492391822. The cubic root of 68812819 is about 409.7853705115.

The spelling of 68812819 in words is "sixty-eight million, eight hundred twelve thousand, eight hundred nineteen".