1312543093 has 4 divisors (see below), whose sum is σ = 1369610208. Its totient is φ = 1255475980.

The previous prime is 1312543091. The next prime is 1312543147. The reversal of 1312543093 is 3903452131.

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 not a de Polignac number, because 1312543093 - 2¹ = 1312543091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312543091) 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, 28533523 + ... + 28533568.

It is an arithmetic number, because the mean of its divisors is an integer number (342402552).

Almost surely, 2^1312543093 is an apocalyptic number.

It is an amenable number.

1312543093 is a deficient number, since it is larger than the sum of its proper divisors (57067115).

1312543093 is an equidigital number, since it uses as much as digits as its factorization.

1312543093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57067114.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1312543093 is about 36229.0366004949. The cubic root of 1312543093 is about 1094.8917674833.

The spelling of 1312543093 in words is "one billion, three hundred twelve million, five hundred forty-three thousand, ninety-three".