1613851379 has 4 divisors (see below), whose sum is σ = 1844401584. Its totient is φ = 1383301176.

The previous prime is 1613851331. The next prime is 1613851381. The reversal of 1613851379 is 9731583161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613851379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613851399) 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, 115275092 + ... + 115275105.

It is an arithmetic number, because the mean of its divisors is an integer number (461100396).

Almost surely, 2^1613851379 is an apocalyptic number.

1613851379 is a deficient number, since it is larger than the sum of its proper divisors (230550205).

1613851379 is an equidigital number, since it uses as much as digits as its factorization.

1613851379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230550204.

The product of its digits is 136080, while the sum is 44.

The square root of 1613851379 is about 40172.7691228773. The cubic root of 1613851379 is about 1172.9725420296.

The spelling of 1613851379 in words is "one billion, six hundred thirteen million, eight hundred fifty-one thousand, three hundred seventy-nine".