404995489 has 2 divisors, whose sum is σ = 404995490. Its totient is φ = 404995488.

The previous prime is 404995453. The next prime is 404995553. The reversal of 404995489 is 984599404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287641600 + 117353889 = 16960^2 + 10833^2 .

It is a cyclic number.

It is not a de Polignac number, because 404995489 - 2¹⁷ = 404864417 is a prime.

It is a super-2 number, since 2×404995489² = 328042692220698242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (404995189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202497744 + 202497745.

It is an arithmetic number, because the mean of its divisors is an integer number (202497745).

Almost surely, 2^404995489 is an apocalyptic number.

It is an amenable number.

404995489 is a deficient number, since it is larger than the sum of its proper divisors (1).

404995489 is an equidigital number, since it uses as much as digits as its factorization.

404995489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 404995489 is about 20124.4997204899. The cubic root of 404995489 is about 739.8608753550.

The spelling of 404995489 in words is "four hundred four million, nine hundred ninety-five thousand, four hundred eighty-nine".