1361609 has 2 divisors, whose sum is σ = 1361610. Its totient is φ = 1361608.

The previous prime is 1361603. The next prime is 1361629. The reversal of 1361609 is 9061631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 595984 = 875^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361609 - 2⁴ = 1361593 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680804 + 680805.

It is an arithmetic number, because the mean of its divisors is an integer number (680805).

2^1361609 is an apocalyptic number.

It is an amenable number.

1361609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361609 is an equidigital number, since it uses as much as digits as its factorization.

1361609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1361609 is about 1166.8800281091. The cubic root of 1361609 is about 110.8368406124.

The spelling of 1361609 in words is "one million, three hundred sixty-one thousand, six hundred nine".