7871897 has 12 divisors (see below), whose sum is σ = 8790768. Its totient is φ = 7042200.

The previous prime is 7871893. The next prime is 7871917. The reversal of 7871897 is 7981787.

It is not a de Polignac number, because 7871897 - 2² = 7871893 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7871893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7622 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (732564).

Almost surely, 2^7871897 is an apocalyptic number.

It is an amenable number.

7871897 is a deficient number, since it is larger than the sum of its proper divisors (918871).

7871897 is a wasteful number, since it uses less digits than its factorization.

7871897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1049 counting only the distinct ones).

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

The square root of 7871897 is about 2805.6901111848. The cubic root of 7871897 is about 198.9267257142.

The spelling of 7871897 in words is "seven million, eight hundred seventy-one thousand, eight hundred ninety-seven".