1323440013 has 16 divisors (see below), whose sum is σ = 2071176320. Its totient is φ = 735811776.

The previous prime is 1323439993. The next prime is 1323440017. The reversal of 1323440013 is 3100443231.

1323440013 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1323440013 - 2⁹ = 1323439501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323440017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850858 + ... + 852411.

It is an arithmetic number, because the mean of its divisors is an integer number (129448520).

Almost surely, 2^1323440013 is an apocalyptic number.

It is an amenable number.

1323440013 is a deficient number, since it is larger than the sum of its proper divisors (747736307).

1323440013 is a wasteful number, since it uses less digits than its factorization.

1323440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703316.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1323440013 is about 36379.1150662025. The cubic root of 1323440013 is about 1097.9134033782.

Adding to 1323440013 its reverse (3100443231), we get a palindrome (4423883244).

The spelling of 1323440013 in words is "one billion, three hundred twenty-three million, four hundred forty thousand, thirteen".