7946491409 has 2 divisors, whose sum is σ = 7946491410. Its totient is φ = 7946491408.

The previous prime is 7946491381. The next prime is 7946491439. The reversal of 7946491409 is 9041946497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7841633809 + 104857600 = 88553^2 + 10240^2 .

It is a cyclic number.

It is not a de Polignac number, because 7946491409 - 2³² = 3651524113 is a prime.

It is a super-3 number, since 3×7946491409³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (7946491439) 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 as a sum of consecutive naturals, namely, 3973245704 + 3973245705.

It is an arithmetic number, because the mean of its divisors is an integer number (3973245705).

Almost surely, 2^7946491409 is an apocalyptic number.

It is an amenable number.

7946491409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7946491409 is an equidigital number, since it uses as much as digits as its factorization.

7946491409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 7946491409 is about 89143.0951280019. The cubic root of 7946491409 is about 1995.5309720828.

The spelling of 7946491409 in words is "seven billion, nine hundred forty-six million, four hundred ninety-one thousand, four hundred nine".