7875971899 has 4 divisors (see below), whose sum is σ = 7876372336. Its totient is φ = 7875571464.

The previous prime is 7875971893. The next prime is 7875971921. The reversal of 7875971899 is 9981795787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9981795787 = 19 ⋅525357673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7875971899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7875971893) 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, 169104 + ... + 210589.

It is an arithmetic number, because the mean of its divisors is an integer number (1969093084).

Almost surely, 2^7875971899 is an apocalyptic number.

7875971899 is a deficient number, since it is larger than the sum of its proper divisors (400437).

7875971899 is a wasteful number, since it uses less digits than its factorization.

7875971899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400436.

The product of its digits is 80015040, while the sum is 70.

The square root of 7875971899 is about 88746.6726080477. The cubic root of 7875971899 is about 1989.6104469670.

The spelling of 7875971899 in words is "seven billion, eight hundred seventy-five million, nine hundred seventy-one thousand, eight hundred ninety-nine".