7871963897 has 8 divisors (see below), whose sum is σ = 9239679936. Its totient is φ = 6565035312.

The previous prime is 7871963881. The next prime is 7871963909. The reversal of 7871963897 is 7983691787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7871963897 - 2⁴ = 7871963881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7871963857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15196583 + ... + 15197100.

It is an arithmetic number, because the mean of its divisors is an integer number (1154959992).

Almost surely, 2^7871963897 is an apocalyptic number.

It is an amenable number.

7871963897 is a deficient number, since it is larger than the sum of its proper divisors (1367716039).

7871963897 is a wasteful number, since it uses less digits than its factorization.

7871963897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30393727.

The product of its digits is 32006016, while the sum is 65.

The square root of 7871963897 is about 88724.0885949244. The cubic root of 7871963897 is about 1989.2728921938.

The spelling of 7871963897 in words is "seven billion, eight hundred seventy-one million, nine hundred sixty-three thousand, eight hundred ninety-seven".