77868829 has 8 divisors (see below), whose sum is σ = 80023680. Its totient is φ = 75729696.

The previous prime is 77868827. The next prime is 77868839. The reversal of 77868829 is 92886877.

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 77868829 - 2¹ = 77868827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77868829.

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, 6489 + ... + 14065.

It is an arithmetic number, because the mean of its divisors is an integer number (10002960).

Almost surely, 2^77868829 is an apocalyptic number.

It is an amenable number.

77868829 is a deficient number, since it is larger than the sum of its proper divisors (2154851).

77868829 is a wasteful number, since it uses less digits than its factorization.

77868829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7859.

The product of its digits is 2709504, while the sum is 55.

The square root of 77868829 is about 8824.3316460795. The cubic root of 77868829 is about 427.0262257036.

The spelling of 77868829 in words is "seventy-seven million, eight hundred sixty-eight thousand, eight hundred twenty-nine".