8121401347 has 32 divisors (see below), whose sum is σ = 8916554304. Its totient is φ = 7368192000.

The previous prime is 8121401333. The next prime is 8121401377. The reversal of 8121401347 is 7431041218.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8121401347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121401377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13512847 + ... + 13513447.

It is an arithmetic number, because the mean of its divisors is an integer number (278642322).

Almost surely, 2^8121401347 is an apocalyptic number.

8121401347 is a deficient number, since it is larger than the sum of its proper divisors (795152957).

8121401347 is a wasteful number, since it uses less digits than its factorization.

8121401347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8121401347 is about 90118.8179405389. The cubic root of 8121401347 is about 2010.0660314273.

The spelling of 8121401347 in words is "eight billion, one hundred twenty-one million, four hundred one thousand, three hundred forty-seven".