1236013313 has 4 divisors (see below), whose sum is σ = 1241871408. Its totient is φ = 1230155220.

The previous prime is 1236013309. The next prime is 1236013367. The reversal of 1236013313 is 3133106321.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1236013313 - 2² = 1236013309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1236013393) 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, 2928731 + ... + 2929152.

It is an arithmetic number, because the mean of its divisors is an integer number (310467852).

Almost surely, 2^1236013313 is an apocalyptic number.

It is an amenable number.

1236013313 is a deficient number, since it is larger than the sum of its proper divisors (5858095).

1236013313 is an equidigital number, since it uses as much as digits as its factorization.

1236013313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5858094.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1236013313 is about 35156.9809995113. The cubic root of 1236013313 is about 1073.1844785298.

Adding to 1236013313 its reverse (3133106321), we get a palindrome (4369119634).

The spelling of 1236013313 in words is "one billion, two hundred thirty-six million, thirteen thousand, three hundred thirteen".