77868443 has 8 divisors (see below), whose sum is σ = 79476000. Its totient is φ = 76275648.

The previous prime is 77868437. The next prime is 77868467. The reversal of 77868443 is 34486877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77868443 - 2⁶ = 77868379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77868433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7298 + ... + 14456.

It is an arithmetic number, because the mean of its divisors is an integer number (9934500).

Almost surely, 2^77868443 is an apocalyptic number.

77868443 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

77868443 is a deficient number, since it is larger than the sum of its proper divisors (1607557).

77868443 is a wasteful number, since it uses less digits than its factorization.

77868443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7381.

The product of its digits is 903168, while the sum is 47.

The square root of 77868443 is about 8824.3097747076. The cubic root of 77868443 is about 427.0255201050.

The spelling of 77868443 in words is "seventy-seven million, eight hundred sixty-eight thousand, four hundred forty-three".