787978851 has 8 divisors (see below), whose sum is σ = 1146151104. Its totient is φ = 477562920.

The previous prime is 787978847. The next prime is 787978859. The reversal of 787978851 is 158879787.

It is a happy number.

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

It is not a de Polignac number, because 787978851 - 2² = 787978847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (787978859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11939041 + ... + 11939106.

It is an arithmetic number, because the mean of its divisors is an integer number (143268888).

Almost surely, 2^787978851 is an apocalyptic number.

787978851 is a deficient number, since it is larger than the sum of its proper divisors (358172253).

787978851 is a wasteful number, since it uses less digits than its factorization.

787978851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23878161.

The product of its digits is 7902720, while the sum is 60.

The square root of 787978851 is about 28070.9609917438. The cubic root of 787978851 is about 923.6445112618.

The spelling of 787978851 in words is "seven hundred eighty-seven million, nine hundred seventy-eight thousand, eight hundred fifty-one".