404367889 has 2 divisors, whose sum is σ = 404367890. Its totient is φ = 404367888.

The previous prime is 404367839. The next prime is 404367917. The reversal of 404367889 is 988763404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254721600 + 149646289 = 15960^2 + 12233^2 .

It is a cyclic number.

It is not a de Polignac number, because 404367889 - 2¹⁵ = 404335121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404367839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202183944 + 202183945.

It is an arithmetic number, because the mean of its divisors is an integer number (202183945).

Almost surely, 2^404367889 is an apocalyptic number.

It is an amenable number.

404367889 is a deficient number, since it is larger than the sum of its proper divisors (1).

404367889 is an equidigital number, since it uses as much as digits as its factorization.

404367889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 404367889 is about 20108.9007407168. The cubic root of 404367889 is about 739.4785034049.

The spelling of 404367889 in words is "four hundred four million, three hundred sixty-seven thousand, eight hundred eighty-nine".