77868823 has 8 divisors (see below), whose sum is σ = 86034528. Its totient is φ = 70101504.

The previous prime is 77868809. The next prime is 77868827. The reversal of 77868823 is 32886877.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77868823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77868827) 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, 99186 + ... + 99967.

It is an arithmetic number, because the mean of its divisors is an integer number (10754316).

Almost surely, 2^77868823 is an apocalyptic number.

77868823 is a deficient number, since it is larger than the sum of its proper divisors (8165705).

77868823 is a wasteful number, since it uses less digits than its factorization.

77868823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199193.

The product of its digits is 903168, while the sum is 49.

The square root of 77868823 is about 8824.3313061104. The cubic root of 77868823 is about 427.0262147357.

It can be divided in two parts, 778688 and 23, that multiplied together give a square (17909824 = 4232²).

The spelling of 77868823 in words is "seventy-seven million, eight hundred sixty-eight thousand, eight hundred twenty-three".