6487812971 has 4 divisors (see below), whose sum is σ = 6488113944. Its totient is φ = 6487512000.

The previous prime is 6487812949. The next prime is 6487812983. The reversal of 6487812971 is 1792187846.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6487812971 - 2²² = 6483618667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6487812271) 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, 115430 + ... + 162171.

It is an arithmetic number, because the mean of its divisors is an integer number (1622028486).

Almost surely, 2^6487812971 is an apocalyptic number.

6487812971 is a deficient number, since it is larger than the sum of its proper divisors (300973).

6487812971 is a wasteful number, since it uses less digits than its factorization.

6487812971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300972.

The product of its digits is 1354752, while the sum is 53.

The square root of 6487812971 is about 80546.9612772574. The cubic root of 6487812971 is about 1865.0884840394.

The spelling of 6487812971 in words is "six billion, four hundred eighty-seven million, eight hundred twelve thousand, nine hundred seventy-one".