1613948345 has 4 divisors (see below), whose sum is σ = 1936738020. Its totient is φ = 1291158672.

The previous prime is 1613948299. The next prime is 1613948351. The reversal of 1613948345 is 5438493161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5438493161 = 151 ⋅36016511.

It can be written as a sum of positive squares in 2 ways, for example, as 706071184 + 907877161 = 26572^2 + 30131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613948345 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1613948296 and 1613948305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161394830 + ... + 161394839.

It is an arithmetic number, because the mean of its divisors is an integer number (484184505).

Almost surely, 2^1613948345 is an apocalyptic number.

It is an amenable number.

1613948345 is a deficient number, since it is larger than the sum of its proper divisors (322789675).

1613948345 is an equidigital number, since it uses as much as digits as its factorization.

1613948345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322789674.

The product of its digits is 311040, while the sum is 44.

The square root of 1613948345 is about 40173.9759670362. The cubic root of 1613948345 is about 1172.9960336967.

The spelling of 1613948345 in words is "one billion, six hundred thirteen million, nine hundred forty-eight thousand, three hundred forty-five".