1641613 has 2 divisors, whose sum is σ = 1641614. Its totient is φ = 1641612.

The previous prime is 1641593. The next prime is 1641617. The reversal of 1641613 is 3161461.

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., 1582564 + 59049 = 1258^2 + 243^2 .

It is an emirp because it is prime and its reverse (3161461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1641613 - 2¹⁷ = 1510541 is a prime.

1641613 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641617) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820806 + 820807.

It is an arithmetic number, because the mean of its divisors is an integer number (820807).

2^1641613 is an apocalyptic number.

It is an amenable number.

1641613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641613 is an equidigital number, since it uses as much as digits as its factorization.

1641613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 1641613 is about 1281.2544634069. The cubic root of 1641613 is about 117.9660200924.

The spelling of 1641613 in words is "one million, six hundred forty-one thousand, six hundred thirteen".