7887971 has 32 divisors (see below), whose sum is σ = 10416000. Its totient is φ = 5927040.

The previous prime is 7887959. The next prime is 7887989. The reversal of 7887971 is 1797887.

It is not a de Polignac number, because 7887971 - 2¹⁰ = 7886947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7887941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129281 + ... + 129341.

It is an arithmetic number, because the mean of its divisors is an integer number (325500).

Almost surely, 2^7887971 is an apocalyptic number.

7887971 is a deficient number, since it is larger than the sum of its proper divisors (2528029).

7887971 is a wasteful number, since it uses less digits than its factorization.

7887971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 110 counting only the distinct ones).

The product of its digits is 197568, while the sum is 47.

The square root of 7887971 is about 2808.5531862509. The cubic root of 7887971 is about 199.0620329659.

The spelling of 7887971 in words is "seven million, eight hundred eighty-seven thousand, nine hundred seventy-one".