1613734321 has 4 divisors (see below), whose sum is σ = 1640189044. Its totient is φ = 1587279600.

The previous prime is 1613734249. The next prime is 1613734327. The reversal of 1613734321 is 1234373161.

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 860835600 + 752898721 = 29340^2 + 27439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613734321 - 2⁹ = 1613733809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613734327) 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, 13227270 + ... + 13227391.

It is an arithmetic number, because the mean of its divisors is an integer number (410047261).

Almost surely, 2^1613734321 is an apocalyptic number.

It is an amenable number.

1613734321 is a deficient number, since it is larger than the sum of its proper divisors (26454723).

1613734321 is an equidigital number, since it uses as much as digits as its factorization.

1613734321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26454722.

The product of its digits is 9072, while the sum is 31.

The square root of 1613734321 is about 40171.3121642796. The cubic root of 1613734321 is about 1172.9441814793.

The spelling of 1613734321 in words is "one billion, six hundred thirteen million, seven hundred thirty-four thousand, three hundred twenty-one".