7928131 has 2 divisors, whose sum is σ = 7928132. Its totient is φ = 7928130.

The previous prime is 7928117. The next prime is 7928147. The reversal of 7928131 is 1318297.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7928131 - 2⁵ = 7928099 is a prime.

It is a super-3 number, since 3×7928131³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 7928093 and 7928102.

It is not a weakly prime, because it can be changed into another prime (7928161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3964065 + 3964066.

It is an arithmetic number, because the mean of its divisors is an integer number (3964066).

Almost surely, 2^7928131 is an apocalyptic number.

7928131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7928131 is an equidigital number, since it uses as much as digits as its factorization.

7928131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 7928131 is about 2815.6936978301. The cubic root of 7928131 is about 199.3992892058.

The spelling of 7928131 in words is "seven million, nine hundred twenty-eight thousand, one hundred thirty-one".