7661393 has 2 divisors, whose sum is σ = 7661394. Its totient is φ = 7661392.

The previous prime is 7661347. The next prime is 7661399. The reversal of 7661393 is 3931667.

7661393 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7118224 + 543169 = 2668^2 + 737^2 .

It is an emirp because it is prime and its reverse (3931667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7661393 - 2¹² = 7657297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7661399) 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, 3830696 + 3830697.

It is an arithmetic number, because the mean of its divisors is an integer number (3830697).

Almost surely, 2^7661393 is an apocalyptic number.

It is an amenable number.

7661393 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661393 is an equidigital number, since it uses as much as digits as its factorization.

7661393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 35.

The square root of 7661393 is about 2767.9221448588. The cubic root of 7661393 is about 197.1375009547.

The spelling of 7661393 in words is "seven million, six hundred sixty-one thousand, three hundred ninety-three".