1313713621 has 8 divisors (see below), whose sum is σ = 1452775104. Its totient is φ = 1177924320.

The previous prime is 1313713613. The next prime is 1313713663. The reversal of 1313713621 is 1263173131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313713621 - 2³ = 1313713613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1313713621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313713321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817201 + ... + 818806.

It is an arithmetic number, because the mean of its divisors is an integer number (181596888).

Almost surely, 2^1313713621 is an apocalyptic number.

1313713621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1313713621 is a deficient number, since it is larger than the sum of its proper divisors (139061483).

1313713621 is a wasteful number, since it uses less digits than its factorization.

1313713621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636091.

The product of its digits is 2268, while the sum is 28.

The square root of 1313713621 is about 36245.1875564191. The cubic root of 1313713621 is about 1095.2171461796.

Adding to 1313713621 its reverse (1263173131), we get a palindrome (2576886752).

The spelling of 1313713621 in words is "one billion, three hundred thirteen million, seven hundred thirteen thousand, six hundred twenty-one".