613969 has 2 divisors, whose sum is σ = 613970. Its totient is φ = 613968.

The previous prime is 613967. The next prime is 613981. The reversal of 613969 is 969316.

613969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473344 + 140625 = 688^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 613969 - 2¹ = 613967 is a prime.

It is a super-2 number, since 2×613969² = 753915865922, which contains 22 as substring.

Together with 613967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (613967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306984 + 306985.

It is an arithmetic number, because the mean of its divisors is an integer number (306985).

2⁶¹³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

613969 is a deficient number, since it is larger than the sum of its proper divisors (1).

613969 is an equidigital number, since it uses as much as digits as its factorization.

613969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 34.

The square root of 613969 is about 783.5617397500. The cubic root of 613969 is about 84.9928021587.

The spelling of 613969 in words is "six hundred thirteen thousand, nine hundred sixty-nine".