613681371 has 12 divisors (see below), whose sum is σ = 910386672. Its totient is φ = 398063376.

The previous prime is 613681357. The next prime is 613681391. The reversal of 613681371 is 173186316.

613681371 is a `hidden beast` number, since 613 + 6 + 8 + 1 + 37 + 1 = 666.

It is not a de Polignac number, because 613681371 - 2¹¹ = 613679323 is a prime.

It is a super-2 number, since 2×613681371² = 753209650224879282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (613681391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 921111 + ... + 921776.

It is an arithmetic number, because the mean of its divisors is an integer number (75865556).

Almost surely, 2^613681371 is an apocalyptic number.

613681371 is a deficient number, since it is larger than the sum of its proper divisors (296705301).

613681371 is a wasteful number, since it uses less digits than its factorization.

613681371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842930 (or 1842927 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 613681371 is about 24772.5931424225. The cubic root of 613681371 is about 849.7952775709.

The spelling of 613681371 in words is "six hundred thirteen million, six hundred eighty-one thousand, three hundred seventy-one".