787868787 has 16 divisors (see below), whose sum is σ = 1080270080. Its totient is φ = 510393312.

The previous prime is 787868743. The next prime is 787868789.

787868787 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 787868787 - 2¹⁸ = 787606643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787868789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91218 + ... + 99480.

It is an arithmetic number, because the mean of its divisors is an integer number (67516880).

Almost surely, 2^787868787 is an apocalyptic number.

787868787 is a deficient number, since it is larger than the sum of its proper divisors (292401293).

787868787 is a wasteful number, since it uses less digits than its factorization.

787868787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162.

The product of its digits is 59006976, while the sum is 66.

The square root of 787868787 is about 28069.0004631444. Note that the first 3 decimals coincide. The cubic root of 787868787 is about 923.6015047170.

The spelling of 787868787 in words is "seven hundred eighty-seven million, eight hundred sixty-eight thousand, seven hundred eighty-seven".