1313434821 has 8 divisors (see below), whose sum is σ = 1766744640. Its totient is φ = 867874112.

The previous prime is 1313434799. The next prime is 1313434823. The reversal of 1313434821 is 1284343131.

It is a happy number.

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 1313434821 - 2¹¹ = 1313432773 is a prime.

It is a super-2 number, since 2×1313434821² = 3450222058030604082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313434823) 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, 1936881 + ... + 1937558.

It is an arithmetic number, because the mean of its divisors is an integer number (220843080).

Almost surely, 2^1313434821 is an apocalyptic number.

It is an amenable number.

1313434821 is a deficient number, since it is larger than the sum of its proper divisors (453309819).

1313434821 is a wasteful number, since it uses less digits than its factorization.

1313434821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3874555.

The product of its digits is 6912, while the sum is 30.

The square root of 1313434821 is about 36241.3413245150. The cubic root of 1313434821 is about 1095.1396640103.

Adding to 1313434821 its reverse (1284343131), we get a palindrome (2597777952).

The spelling of 1313434821 in words is "one billion, three hundred thirteen million, four hundred thirty-four thousand, eight hundred twenty-one".