7513318609 has 2 divisors, whose sum is σ = 7513318610. Its totient is φ = 7513318608.

The previous prime is 7513318567. The next prime is 7513318639. The reversal of 7513318609 is 9068133157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7254269584 + 259049025 = 85172^2 + 16095^2 .

It is a cyclic number.

It is not a de Polignac number, because 7513318609 - 2¹³ = 7513310417 is a prime.

It is not a weakly prime, because it can be changed into another prime (7513318639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3756659304 + 3756659305.

It is an arithmetic number, because the mean of its divisors is an integer number (3756659305).

Almost surely, 2^7513318609 is an apocalyptic number.

It is an amenable number.

7513318609 is a deficient number, since it is larger than the sum of its proper divisors (1).

7513318609 is an equidigital number, since it uses as much as digits as its factorization.

7513318609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 7513318609 is about 86679.4012958096. The cubic root of 7513318609 is about 1958.5918152023.

The spelling of 7513318609 in words is "seven billion, five hundred thirteen million, three hundred eighteen thousand, six hundred nine".