1393012013 has 4 divisors (see below), whose sum is σ = 1441046940. Its totient is φ = 1344977088.

The previous prime is 1393012003. The next prime is 1393012021. The reversal of 1393012013 is 3102103931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 843437764 + 549574249 = 29042^2 + 23443^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393012013 - 2⁸ = 1393011757 is a prime.

It is a super-3 number, since 3×1393012013³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1393012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393012003) 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, 24017420 + ... + 24017477.

It is an arithmetic number, because the mean of its divisors is an integer number (360261735).

Almost surely, 2^1393012013 is an apocalyptic number.

It is an amenable number.

1393012013 is a deficient number, since it is larger than the sum of its proper divisors (48034927).

1393012013 is an equidigital number, since it uses as much as digits as its factorization.

1393012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48034926.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1393012013 is about 37323.0761459985. The cubic root of 1393012013 is about 1116.8245547991.

Adding to 1393012013 its reverse (3102103931), we get a palindrome (4495115944).

The spelling of 1393012013 in words is "one billion, three hundred ninety-three million, twelve thousand, thirteen".