613971 has 6 divisors (see below), whose sum is σ = 886860. Its totient is φ = 409308.

The previous prime is 613969. The next prime is 613981. The reversal of 613971 is 179316.

It is not a de Polignac number, because 613971 - 2¹ = 613969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (613981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34101 + ... + 34118.

It is an arithmetic number, because the mean of its divisors is an integer number (147810).

2⁶¹³⁹⁷¹ is an apocalyptic number.

613971 is a deficient number, since it is larger than the sum of its proper divisors (272889).

613971 is a wasteful number, since it uses less digits than its factorization.

613971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68225 (or 68222 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 613971 is about 783.5630159726. The cubic root of 613971 is about 84.9928944464.

The spelling of 613971 in words is "six hundred thirteen thousand, nine hundred seventy-one".