613091809 has 8 divisors (see below), whose sum is σ = 669701952. Its totient is φ = 556627440.

The previous prime is 613091803. The next prime is 613091827. The reversal of 613091809 is 908190316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613091809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613091803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27549 + ... + 44554.

It is an arithmetic number, because the mean of its divisors is an integer number (83712744).

Almost surely, 2^613091809 is an apocalyptic number.

It is an amenable number.

613091809 is a deficient number, since it is larger than the sum of its proper divisors (56610143).

613091809 is a wasteful number, since it uses less digits than its factorization.

613091809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72887.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 613091809 is about 24760.6908021566. The cubic root of 613091809 is about 849.5230583860.

The spelling of 613091809 in words is "six hundred thirteen million, ninety-one thousand, eight hundred nine".