1315143173 has 2 divisors, whose sum is σ = 1315143174. Its totient is φ = 1315143172.

The previous prime is 1315143161. The next prime is 1315143199. The reversal of 1315143173 is 3713415131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1225140004 + 90003169 = 35002^2 + 9487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315143173 - 2⁴ = 1315143157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315133173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657571586 + 657571587.

It is an arithmetic number, because the mean of its divisors is an integer number (657571587).

Almost surely, 2^1315143173 is an apocalyptic number.

It is an amenable number.

1315143173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315143173 is an equidigital number, since it uses as much as digits as its factorization.

1315143173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 1315143173 is about 36264.9027711367. The cubic root of 1315143173 is about 1095.6142652755.

The spelling of 1315143173 in words is "one billion, three hundred fifteen million, one hundred forty-three thousand, one hundred seventy-three".