804090901 has 2 divisors, whose sum is σ = 804090902. Its totient is φ = 804090900.

The previous prime is 804090877. The next prime is 804090913. The reversal of 804090901 is 109090408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746710276 + 57380625 = 27326^2 + 7575^2 .

It is a cyclic number.

It is not a de Polignac number, because 804090901 - 2¹³ = 804082709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804090601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402045450 + 402045451.

It is an arithmetic number, because the mean of its divisors is an integer number (402045451).

Almost surely, 2^804090901 is an apocalyptic number.

It is an amenable number.

804090901 is a deficient number, since it is larger than the sum of its proper divisors (1).

804090901 is an equidigital number, since it uses as much as digits as its factorization.

804090901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 804090901 is about 28356.4966277571. The cubic root of 804090901 is about 929.8974338655.

The spelling of 804090901 in words is "eight hundred four million, ninety thousand, nine hundred one".