613887 has 8 divisors (see below), whose sum is σ = 866736. Its totient is φ = 385152.

The previous prime is 613883. The next prime is 613889. The reversal of 613887 is 788316.

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

It is not a de Polignac number, because 613887 - 2² = 613883 is a prime.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613883) 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, 5968 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (108342).

2⁶¹³⁸⁸⁷ is an apocalyptic number.

613887 is a deficient number, since it is larger than the sum of its proper divisors (252849).

613887 is a wasteful number, since it uses less digits than its factorization.

613887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12057.

The product of its digits is 8064, while the sum is 33.

The square root of 613887 is about 783.5094128343. The cubic root of 613887 is about 84.9890181891.

The spelling of 613887 in words is "six hundred thirteen thousand, eight hundred eighty-seven".