1531986713 has 2 divisors, whose sum is σ = 1531986714. Its totient is φ = 1531986712.

The previous prime is 1531986697. The next prime is 1531986721. The reversal of 1531986713 is 3176891351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792309904 + 739676809 = 28148^2 + 27197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531986713 - 2⁴ = 1531986697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1531986763) 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, 765993356 + 765993357.

It is an arithmetic number, because the mean of its divisors is an integer number (765993357).

Almost surely, 2^1531986713 is an apocalyptic number.

It is an amenable number.

1531986713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531986713 is an equidigital number, since it uses as much as digits as its factorization.

1531986713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 1531986713 is about 39140.6018476977. The cubic root of 1531986713 is about 1152.7938906353.

The spelling of 1531986713 in words is "one billion, five hundred thirty-one million, nine hundred eighty-six thousand, seven hundred thirteen".