1612309 has 2 divisors, whose sum is σ = 1612310. Its totient is φ = 1612308.

The previous prime is 1612307. The next prime is 1612319. The reversal of 1612309 is 9032161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1493284 + 119025 = 1222^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612309 - 2¹ = 1612307 is a prime.

It is a super-2 number, since 2×1612309² = 5199080622962, which contains 22 as substring.

Together with 1612307, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

1612309 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1612309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806154 + 806155.

It is an arithmetic number, because the mean of its divisors is an integer number (806155).

2^1612309 is an apocalyptic number.

It is an amenable number.

1612309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612309 is an equidigital number, since it uses as much as digits as its factorization.

1612309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1612309 is about 1269.7673015163. The cubic root of 1612309 is about 117.2598747826.

The spelling of 1612309 in words is "one million, six hundred twelve thousand, three hundred nine".