613869 has 4 divisors (see below), whose sum is σ = 818496. Its totient is φ = 409244.

The previous prime is 613861. The next prime is 613883. The reversal of 613869 is 968316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 613869 - 2³ = 613861 is a prime.

It is a super-2 number, since 2×613869² = 753670298322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102309 + ... + 102314.

It is an arithmetic number, because the mean of its divisors is an integer number (204624).

2⁶¹³⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

613869 is a deficient number, since it is larger than the sum of its proper divisors (204627).

613869 is a wasteful number, since it uses less digits than its factorization.

613869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204626.

The product of its digits is 7776, while the sum is 33.

The square root of 613869 is about 783.4979259705. The cubic root of 613869 is about 84.9881875165.

The spelling of 613869 in words is "six hundred thirteen thousand, eight hundred sixty-nine".