315118789 has 2 divisors, whose sum is σ = 315118790. Its totient is φ = 315118788.

The previous prime is 315118787. The next prime is 315118807. The reversal of 315118789 is 987811513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244390689 + 70728100 = 15633^2 + 8410^2 .

It is a cyclic number.

It is not a de Polignac number, because 315118789 - 2¹ = 315118787 is a prime.

Together with 315118787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315118787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157559394 + 157559395.

It is an arithmetic number, because the mean of its divisors is an integer number (157559395).

Almost surely, 2^315118789 is an apocalyptic number.

It is an amenable number.

315118789 is a deficient number, since it is larger than the sum of its proper divisors (1).

315118789 is an equidigital number, since it uses as much as digits as its factorization.

315118789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 43.

The square root of 315118789 is about 17751.5855348191. The cubic root of 315118789 is about 680.4947300843.

The spelling of 315118789 in words is "three hundred fifteen million, one hundred eighteen thousand, seven hundred eighty-nine".