1388512513 has 2 divisors, whose sum is σ = 1388512514. Its totient is φ = 1388512512.

The previous prime is 1388512469. The next prime is 1388512577. The reversal of 1388512513 is 3152158831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196329744 + 192182769 = 34588^2 + 13863^2 .

It is an emirp because it is prime and its reverse (3152158831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388512513 - 2¹³ = 1388504321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388512813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694256256 + 694256257.

It is an arithmetic number, because the mean of its divisors is an integer number (694256257).

Almost surely, 2^1388512513 is an apocalyptic number.

It is an amenable number.

1388512513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388512513 is an equidigital number, since it uses as much as digits as its factorization.

1388512513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 1388512513 is about 37262.7496704148. The cubic root of 1388512513 is about 1115.6207909965.

The spelling of 1388512513 in words is "one billion, three hundred eighty-eight million, five hundred twelve thousand, five hundred thirteen".