6161609 has 2 divisors, whose sum is σ = 6161610. Its totient is φ = 6161608.

The previous prime is 6161581. The next prime is 6161629. The reversal of 6161609 is 9061616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6017209 + 144400 = 2453^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 6161609 - 2¹² = 6157513 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6161629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080804 + 3080805.

It is an arithmetic number, because the mean of its divisors is an integer number (3080805).

Almost surely, 2^6161609 is an apocalyptic number.

It is an amenable number.

6161609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6161609 is an equidigital number, since it uses as much as digits as its factorization.

6161609 is an evil number, because the sum of its binary digits is even.

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

The square root of 6161609 is about 2482.2588503216. The cubic root of 6161609 is about 183.3290882396.

The spelling of 6161609 in words is "six million, one hundred sixty-one thousand, six hundred nine".