8129847401 has 16 divisors (see below), whose sum is σ = 8981429520. Its totient is φ = 7311098880.

The previous prime is 8129847377. The next prime is 8129847413. The reversal of 8129847401 is 1047489218.

It can be written as a sum of positive squares in 8 ways, for example, as 657973801 + 7471873600 = 25651^2 + 86440^2 .

It is a cyclic number.

It is not a de Polignac number, because 8129847401 - 2¹⁸ = 8129585257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8129847431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380285 + ... + 401093.

It is an arithmetic number, because the mean of its divisors is an integer number (561339345).

Almost surely, 2^8129847401 is an apocalyptic number.

It is an amenable number.

8129847401 is a deficient number, since it is larger than the sum of its proper divisors (851582119).

8129847401 is a wasteful number, since it uses less digits than its factorization.

8129847401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21596.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 8129847401 is about 90165.6664202068. Note that the first 3 decimals coincide. The cubic root of 8129847401 is about 2010.7625961233.

The spelling of 8129847401 in words is "eight billion, one hundred twenty-nine million, eight hundred forty-seven thousand, four hundred one".