1613609 has 2 divisors, whose sum is σ = 1613610. Its totient is φ = 1613608.

The previous prime is 1613597. The next prime is 1613621. The reversal of 1613609 is 9063161.

It is a balanced prime because it is at equal distance from previous prime (1613597) and next prime (1613621).

It can be written as a sum of positive squares in only one way, i.e., 1507984 + 105625 = 1228^2 + 325^2 .

It is an emirp because it is prime and its reverse (9063161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1613609 - 2⁴ = 1613593 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 (1613639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806804 + 806805.

It is an arithmetic number, because the mean of its divisors is an integer number (806805).

2^1613609 is an apocalyptic number.

It is an amenable number.

1613609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613609 is an equidigital number, since it uses as much as digits as its factorization.

1613609 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1613609 is about 1270.2791031895. The cubic root of 1613609 is about 117.2913817468.

It can be divided in two parts, 1613 and 609, that added together give a palindrome (2222).

The spelling of 1613609 in words is "one million, six hundred thirteen thousand, six hundred nine".