1234221613 has 4 divisors (see below), whose sum is σ = 1251605088. Its totient is φ = 1216838140.

The previous prime is 1234221559. The next prime is 1234221619. The reversal of 1234221613 is 3161224321.

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 1234221613 - 2²⁹ = 697350701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234221619) 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, 8691631 + ... + 8691772.

It is an arithmetic number, because the mean of its divisors is an integer number (312901272).

Almost surely, 2^1234221613 is an apocalyptic number.

It is an amenable number.

1234221613 is a deficient number, since it is larger than the sum of its proper divisors (17383475).

1234221613 is an equidigital number, since it uses as much as digits as its factorization.

1234221613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17383474.

The product of its digits is 1728, while the sum is 25.

The square root of 1234221613 is about 35131.4903327485. The cubic root of 1234221613 is about 1072.6656722314.

Adding to 1234221613 its reverse (3161224321), we get a palindrome (4395445934).

The spelling of 1234221613 in words is "one billion, two hundred thirty-four million, two hundred twenty-one thousand, six hundred thirteen".