611969 has 2 divisors, whose sum is σ = 611970. Its totient is φ = 611968.

The previous prime is 611957. The next prime is 611977. The reversal of 611969 is 969116.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 169744 = 665^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 611969 - 2⁴ = 611953 is a prime.

It is a super-2 number, since 2×611969² = 749012113922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (611939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305984 + 305985.

It is an arithmetic number, because the mean of its divisors is an integer number (305985).

2⁶¹¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

611969 is a deficient number, since it is larger than the sum of its proper divisors (1).

611969 is an equidigital number, since it uses as much as digits as its factorization.

611969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 611969 is about 782.2844751112. The cubic root of 611969 is about 84.9004139356.

The spelling of 611969 in words is "six hundred eleven thousand, nine hundred sixty-nine".