7478507513 has 2 divisors, whose sum is σ = 7478507514. Its totient is φ = 7478507512.

The previous prime is 7478507479. The next prime is 7478507527. The reversal of 7478507513 is 3157058747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7439407504 + 39100009 = 86252^2 + 6253^2 .

It is an emirp because it is prime and its reverse (3157058747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7478507513 - 2¹⁶ = 7478441977 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 (7478507563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3739253756 + 3739253757.

It is an arithmetic number, because the mean of its divisors is an integer number (3739253757).

Almost surely, 2^7478507513 is an apocalyptic number.

It is an amenable number.

7478507513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7478507513 is an equidigital number, since it uses as much as digits as its factorization.

7478507513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823200, while the sum is 47.

The square root of 7478507513 is about 86478.3644213973. The cubic root of 7478507513 is about 1955.5622485252.

The spelling of 7478507513 in words is "seven billion, four hundred seventy-eight million, five hundred seven thousand, five hundred thirteen".