1804607813 has 2 divisors, whose sum is σ = 1804607814. Its totient is φ = 1804607812.

The previous prime is 1804607801. The next prime is 1804607843. The reversal of 1804607813 is 3187064081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018758724 + 785849089 = 31918^2 + 28033^2 .

It is an emirp because it is prime and its reverse (3187064081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1804607813 - 2²⁶ = 1737498949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1804607843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902303906 + 902303907.

It is an arithmetic number, because the mean of its divisors is an integer number (902303907).

Almost surely, 2^1804607813 is an apocalyptic number.

It is an amenable number.

1804607813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804607813 is an equidigital number, since it uses as much as digits as its factorization.

1804607813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 1804607813 is about 42480.6757596910. The cubic root of 1804607813 is about 1217.4775016749.

The spelling of 1804607813 in words is "one billion, eight hundred four million, six hundred seven thousand, eight hundred thirteen".