7871934401 has 4 divisors (see below), whose sum is σ = 7872125652. Its totient is φ = 7871743152.

The previous prime is 7871934383. The next prime is 7871934409. The reversal of 7871934401 is 1044391787.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4763760400 + 3108174001 = 69020^2 + 55751^2 .

It is a cyclic number.

It is not a de Polignac number, because 7871934401 - 2¹⁸ = 7871672257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7871934409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5690 + ... + 125603.

It is an arithmetic number, because the mean of its divisors is an integer number (1968031413).

Almost surely, 2^7871934401 is an apocalyptic number.

It is an amenable number.

7871934401 is a deficient number, since it is larger than the sum of its proper divisors (191251).

7871934401 is a wasteful number, since it uses less digits than its factorization.

7871934401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191250.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 7871934401 is about 88723.9223715904. The cubic root of 7871934401 is about 1989.2704076098.

The spelling of 7871934401 in words is "seven billion, eight hundred seventy-one million, nine hundred thirty-four thousand, four hundred one".