787740671 has 4 divisors (see below), whose sum is σ = 787798200. Its totient is φ = 787683144.

The previous prime is 787740647. The next prime is 787740677. The reversal of 787740671 is 176047787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 787740671 - 2¹⁰ = 787739647 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 (787740677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4940 + ... + 39998.

It is an arithmetic number, because the mean of its divisors is an integer number (196949550).

Almost surely, 2^787740671 is an apocalyptic number.

787740671 is a deficient number, since it is larger than the sum of its proper divisors (57529).

787740671 is a wasteful number, since it uses less digits than its factorization.

787740671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57528.

The product of its (nonzero) digits is 460992, while the sum is 47.

The square root of 787740671 is about 28066.7182085829. The cubic root of 787740671 is about 923.5514394664.

The spelling of 787740671 in words is "seven hundred eighty-seven million, seven hundred forty thousand, six hundred seventy-one".