1318652273 has 4 divisors (see below), whose sum is σ = 1328139120. Its totient is φ = 1309165428.

The previous prime is 1318652249. The next prime is 1318652299. The reversal of 1318652273 is 3722568131.

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 an emirpimes, since its reverse is a distinct semiprime: 3722568131 = 569 ⋅6542299.

It is a cyclic number.

It is not a de Polignac number, because 1318652273 - 2⁸ = 1318652017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318652173) 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, 4743215 + ... + 4743492.

It is an arithmetic number, because the mean of its divisors is an integer number (332034780).

Almost surely, 2^1318652273 is an apocalyptic number.

It is an amenable number.

1318652273 is a deficient number, since it is larger than the sum of its proper divisors (9486847).

1318652273 is an equidigital number, since it uses as much as digits as its factorization.

1318652273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486846.

The product of its digits is 60480, while the sum is 38.

The square root of 1318652273 is about 36313.2520300785. The cubic root of 1318652273 is about 1096.5878489172.

The spelling of 1318652273 in words is "one billion, three hundred eighteen million, six hundred fifty-two thousand, two hundred seventy-three".