1293128713 has 4 divisors (see below), whose sum is σ = 1294908160. Its totient is φ = 1291349268.

The previous prime is 1293128689. The next prime is 1293128729. The reversal of 1293128713 is 3178213921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1293128713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1293128113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888633 + ... + 890086.

It is an arithmetic number, because the mean of its divisors is an integer number (323727040).

Almost surely, 2^1293128713 is an apocalyptic number.

It is an amenable number.

1293128713 is a deficient number, since it is larger than the sum of its proper divisors (1779447).

1293128713 is an equidigital number, since it uses as much as digits as its factorization.

1293128713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779446.

The product of its digits is 18144, while the sum is 37.

The square root of 1293128713 is about 35960.0989014213. The cubic root of 1293128713 is about 1089.4665944973.

The spelling of 1293128713 in words is "one billion, two hundred ninety-three million, one hundred twenty-eight thousand, seven hundred thirteen".