1313123541 has 4 divisors (see below), whose sum is σ = 1750831392. Its totient is φ = 875415692.

The previous prime is 1313123527. The next prime is 1313123549. The reversal of 1313123541 is 1453213131.

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: 1453213131 = 3 ⋅484404377.

It is a cyclic number.

It is not a de Polignac number, because 1313123541 - 2⁶ = 1313123477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313123549) 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, 218853921 + ... + 218853926.

It is an arithmetic number, because the mean of its divisors is an integer number (437707848).

Almost surely, 2^1313123541 is an apocalyptic number.

It is an amenable number.

1313123541 is a deficient number, since it is larger than the sum of its proper divisors (437707851).

1313123541 is an equidigital number, since it uses as much as digits as its factorization.

1313123541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437707850.

The product of its digits is 1080, while the sum is 24.

The square root of 1313123541 is about 36237.0465270005. The cubic root of 1313123541 is about 1095.0531422677.

Adding to 1313123541 its reverse (1453213131), we get a palindrome (2766336672).

The spelling of 1313123541 in words is "one billion, three hundred thirteen million, one hundred twenty-three thousand, five hundred forty-one".