404765897 has 2 divisors, whose sum is σ = 404765898. Its totient is φ = 404765896.

The previous prime is 404765857. The next prime is 404765917. The reversal of 404765897 is 798567404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284293321 + 120472576 = 16861^2 + 10976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404765897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404765807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202382948 + 202382949.

It is an arithmetic number, because the mean of its divisors is an integer number (202382949).

Almost surely, 2^404765897 is an apocalyptic number.

It is an amenable number.

404765897 is a deficient number, since it is larger than the sum of its proper divisors (1).

404765897 is an equidigital number, since it uses as much as digits as its factorization.

404765897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 404765897 is about 20118.7946209508. The cubic root of 404765897 is about 739.7210398491.

The spelling of 404765897 in words is "four hundred four million, seven hundred sixty-five thousand, eight hundred ninety-seven".