1312018973 has 4 divisors (see below), whose sum is σ = 1312115040. Its totient is φ = 1311922908.

The previous prime is 1312018963. The next prime is 1312019017. The reversal of 1312018973 is 3798102131.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1312018973 - 2⁶ = 1312018909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312018933) 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, 23303 + ... + 56276.

It is an arithmetic number, because the mean of its divisors is an integer number (328028760).

Almost surely, 2^1312018973 is an apocalyptic number.

It is an amenable number.

1312018973 is a deficient number, since it is larger than the sum of its proper divisors (96067).

1312018973 is an equidigital number, since it uses as much as digits as its factorization.

1312018973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96066.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 1312018973 is about 36221.8024537709. The cubic root of 1312018973 is about 1094.7460119962.

The spelling of 1312018973 in words is "one billion, three hundred twelve million, eighteen thousand, nine hundred seventy-three".