804144427 has 2 divisors, whose sum is σ = 804144428. Its totient is φ = 804144426.

The previous prime is 804144413. The next prime is 804144431. The reversal of 804144427 is 724441408.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-804144427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 804144392 and 804144401.

It is not a weakly prime, because it can be changed into another prime (804144457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402072213 + 402072214.

It is an arithmetic number, because the mean of its divisors is an integer number (402072214).

Almost surely, 2^804144427 is an apocalyptic number.

804144427 is a deficient number, since it is larger than the sum of its proper divisors (1).

804144427 is an equidigital number, since it uses as much as digits as its factorization.

804144427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 34.

The square root of 804144427 is about 28357.4404169347. The cubic root of 804144427 is about 929.9180669331.

The spelling of 804144427 in words is "eight hundred four million, one hundred forty-four thousand, four hundred twenty-seven".