315743189 has 2 divisors, whose sum is σ = 315743190. Its totient is φ = 315743188.

The previous prime is 315743179. The next prime is 315743203. The reversal of 315743189 is 981347513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277488964 + 38254225 = 16658^2 + 6185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315743189 is a prime.

It is a super-2 number, since 2×315743189² = 199387522799779442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315743119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157871594 + 157871595.

It is an arithmetic number, because the mean of its divisors is an integer number (157871595).

Almost surely, 2^315743189 is an apocalyptic number.

It is an amenable number.

315743189 is a deficient number, since it is larger than the sum of its proper divisors (1).

315743189 is an equidigital number, since it uses as much as digits as its factorization.

315743189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 315743189 is about 17769.1639927150. The cubic root of 315743189 is about 680.9438946420.

The spelling of 315743189 in words is "three hundred fifteen million, seven hundred forty-three thousand, one hundred eighty-nine".