8065397421 has 16 divisors (see below), whose sum is σ = 11950142400. Its totient is φ = 5376299184.

The previous prime is 8065397401. The next prime is 8065397449. The reversal of 8065397421 is 1247935608.

8065397421 is a `hidden beast` number, since 80 + 65 + 3 + 97 + 421 = 666.

8065397421 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8065397421 - 2⁶ = 8065397357 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

8065397421 is strictly pandigital in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8065397401) 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 15 ways as a sum of consecutive naturals, for example, 378955 + ... + 399671.

It is an arithmetic number, because the mean of its divisors is an integer number (746883900).

It is a 1-persistent number, because it is pandigital, but 2⋅8065397421 = 16130794842 is not.

Almost surely, 2^8065397421 is an apocalyptic number.

It is an amenable number.

8065397421 is a deficient number, since it is larger than the sum of its proper divisors (3884744979).

8065397421 is a wasteful number, since it uses less digits than its factorization.

8065397421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35145 (or 35139 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 8065397421 is about 89807.5577053513. The cubic root of 8065397421 is about 2005.4350020807.

The spelling of 8065397421 in words is "eight billion, sixty-five million, three hundred ninety-seven thousand, four hundred twenty-one".