1316621753 has 4 divisors (see below), whose sum is σ = 1320416400. Its totient is φ = 1312827108.

The previous prime is 1316621749. The next prime is 1316621783. The reversal of 1316621753 is 3571266131.

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: 3571266131 = 20233 ⋅176507.

It is a cyclic number.

It is not a de Polignac number, because 1316621753 - 2² = 1316621749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1316621783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1896803 + ... + 1897496.

It is an arithmetic number, because the mean of its divisors is an integer number (330104100).

Almost surely, 2^1316621753 is an apocalyptic number.

It is an amenable number.

1316621753 is a deficient number, since it is larger than the sum of its proper divisors (3794647).

1316621753 is an equidigital number, since it uses as much as digits as its factorization.

1316621753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794646.

The product of its digits is 22680, while the sum is 35.

The square root of 1316621753 is about 36285.2828706075. The cubic root of 1316621753 is about 1096.0247013565.

Adding to 1316621753 its reverse (3571266131), we get a palindrome (4887887884).

The spelling of 1316621753 in words is "one billion, three hundred sixteen million, six hundred twenty-one thousand, seven hundred fifty-three".