1604299813 has 2 divisors, whose sum is σ = 1604299814. Its totient is φ = 1604299812.

The previous prime is 1604299811. The next prime is 1604299859. The reversal of 1604299813 is 3189924061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1343735649 + 260564164 = 36657^2 + 16142^2 .

It is an emirp because it is prime and its reverse (3189924061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1604299813 - 2¹ = 1604299811 is a prime.

Together with 1604299811, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1604299813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604299811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802149906 + 802149907.

It is an arithmetic number, because the mean of its divisors is an integer number (802149907).

Almost surely, 2^1604299813 is an apocalyptic number.

It is an amenable number.

1604299813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604299813 is an equidigital number, since it uses as much as digits as its factorization.

1604299813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1604299813 is about 40053.7116007992. The cubic root of 1604299813 is about 1170.6538855924.

The spelling of 1604299813 in words is "one billion, six hundred four million, two hundred ninety-nine thousand, eight hundred thirteen".