613091685 has 8 divisors (see below), whose sum is σ = 980946720. Its totient is φ = 326982224.

The previous prime is 613091669. The next prime is 613091693. The reversal of 613091685 is 586190316.

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

It is a cyclic number.

It is not a de Polignac number, because 613091685 - 2⁴ = 613091669 is a prime.

It is a super-2 number, since 2×613091685² = 751762828432278450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20436375 + ... + 20436404.

It is an arithmetic number, because the mean of its divisors is an integer number (122618340).

Almost surely, 2^613091685 is an apocalyptic number.

It is an amenable number.

613091685 is a deficient number, since it is larger than the sum of its proper divisors (367855035).

613091685 is a wasteful number, since it uses less digits than its factorization.

613091685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40872787.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 613091685 is about 24760.6882981875. The cubic root of 613091685 is about 849.5230011129.

The spelling of 613091685 in words is "six hundred thirteen million, ninety-one thousand, six hundred eighty-five".