804420370309 has 2 divisors, whose sum is σ = 804420370310. Its totient is φ = 804420370308.

The previous prime is 804420370297. The next prime is 804420370319. The reversal of 804420370309 is 903073024408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662102807809 + 142317562500 = 813697^2 + 377250^2 .

It is a cyclic number.

It is not a de Polignac number, because 804420370309 - 2²¹ = 804418273157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804420370319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402210185154 + 402210185155.

It is an arithmetic number, because the mean of its divisors is an integer number (402210185155).

Almost surely, 2^804420370309 is an apocalyptic number.

It is an amenable number.

804420370309 is a deficient number, since it is larger than the sum of its proper divisors (1).

804420370309 is an equidigital number, since it uses as much as digits as its factorization.

804420370309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 804420370309 in words is "eight hundred four billion, four hundred twenty million, three hundred seventy thousand, three hundred nine".