315728927989 has 2 divisors, whose sum is σ = 315728927990. Its totient is φ = 315728927988.

The previous prime is 315728927957. The next prime is 315728928023. The reversal of 315728927989 is 989729827513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222941675889 + 92787252100 = 472167^2 + 304610^2 .

It is a cyclic number.

It is not a de Polignac number, because 315728927989 - 2⁵ = 315728927957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315728927929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157864463994 + 157864463995.

It is an arithmetic number, because the mean of its divisors is an integer number (157864463995).

Almost surely, 2^315728927989 is an apocalyptic number.

It is an amenable number.

315728927989 is a deficient number, since it is larger than the sum of its proper divisors (1).

315728927989 is an equidigital number, since it uses as much as digits as its factorization.

315728927989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 70.

The spelling of 315728927989 in words is "three hundred fifteen billion, seven hundred twenty-eight million, nine hundred twenty-seven thousand, nine hundred eighty-nine".