613966 has 16 divisors (see below), whose sum is σ = 984960. Its totient is φ = 286200.

The previous prime is 613957. The next prime is 613967. The reversal of 613966 is 669316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613967) by changing a digit.

613966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 3991 + ... + 4141.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2⁶¹³⁹⁶⁶ is an apocalyptic number.

613966 is a deficient number, since it is larger than the sum of its proper divisors (370994).

613966 is a wasteful number, since it uses less digits than its factorization.

613966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its digits is 5832, while the sum is 31.

The square root of 613966 is about 783.5598254122. The cubic root of 613966 is about 84.9926637267.

The spelling of 613966 in words is "six hundred thirteen thousand, nine hundred sixty-six".