611669 has 4 divisors (see below), whose sum is σ = 617196. Its totient is φ = 606144.

The previous prime is 611657. The next prime is 611671. The reversal of 611669 is 966116.

611669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56644 + 555025 = 238^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 611669 - 2¹² = 607573 is a prime.

It is a super-2 number, since 2×611669² = 748277931122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594 + ... + 2819.

It is an arithmetic number, because the mean of its divisors is an integer number (154299).

2⁶¹¹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

611669 is a deficient number, since it is larger than the sum of its proper divisors (5527).

611669 is a wasteful number, since it uses less digits than its factorization.

611669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526.

The product of its digits is 1944, while the sum is 29.

The square root of 611669 is about 782.0927055024. The cubic root of 611669 is about 84.8865383486.

The spelling of 611669 in words is "six hundred eleven thousand, six hundred sixty-nine".