9428712081 has 4 divisors (see below), whose sum is σ = 12571616112. Its totient is φ = 6285808052.

The previous prime is 9428712071. The next prime is 9428712089. The reversal of 9428712081 is 1802178249.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9428712081 - 2¹¹ = 9428710033 is a prime.

It is a super-2 number, since 2×9428712081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9428712089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571452011 + ... + 1571452016.

It is an arithmetic number, because the mean of its divisors is an integer number (3142904028).

Almost surely, 2^9428712081 is an apocalyptic number.

It is an amenable number.

9428712081 is a deficient number, since it is larger than the sum of its proper divisors (3142904031).

9428712081 is a wasteful number, since it uses less digits than its factorization.

9428712081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142904030.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 9428712081 is about 97101.5555024738. Note that the first 4 decimals coincide. The cubic root of 9428712081 is about 2112.6008882224.

The spelling of 9428712081 in words is "nine billion, four hundred twenty-eight million, seven hundred twelve thousand, eighty-one".