764971871 has 4 divisors (see below), whose sum is σ = 765039000. Its totient is φ = 764904744.

The previous prime is 764971847. The next prime is 764971951. The reversal of 764971871 is 178179467.

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 764971871 - 2¹⁰ = 764970847 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 (764971771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11741 + ... + 40838.

It is an arithmetic number, because the mean of its divisors is an integer number (191259750).

Almost surely, 2^764971871 is an apocalyptic number.

764971871 is a deficient number, since it is larger than the sum of its proper divisors (67129).

764971871 is a wasteful number, since it uses less digits than its factorization.

764971871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67128.

The product of its digits is 592704, while the sum is 50.

The square root of 764971871 is about 27658.1248641335. The cubic root of 764971871 is about 914.5662175889.

The spelling of 764971871 in words is "seven hundred sixty-four million, nine hundred seventy-one thousand, eight hundred seventy-one".