787949787 has 4 divisors (see below), whose sum is σ = 1050599720. Its totient is φ = 525299856.

The previous prime is 787949707. The next prime is 787949797.

787949787 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 787949787 - 2⁸ = 787949531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787949707) 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 3 ways as a sum of consecutive naturals, for example, 131324962 + ... + 131324967.

It is an arithmetic number, because the mean of its divisors is an integer number (262649930).

Almost surely, 2^787949787 is an apocalyptic number.

787949787 is a deficient number, since it is larger than the sum of its proper divisors (262649933).

787949787 is a wasteful number, since it uses less digits than its factorization.

787949787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262649932.

The product of its digits is 49787136, while the sum is 66.

The square root of 787949787 is about 28070.4432989577. The cubic root of 787949787 is about 923.6331551473.

The spelling of 787949787 in words is "seven hundred eighty-seven million, nine hundred forty-nine thousand, seven hundred eighty-seven".