405354889 has 2 divisors, whose sum is σ = 405354890. Its totient is φ = 405354888.

The previous prime is 405354881. The next prime is 405354913. The reversal of 405354889 is 988453504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365765625 + 39589264 = 19125^2 + 6292^2 .

It is a cyclic number.

It is not a de Polignac number, because 405354889 - 2³ = 405354881 is a prime.

It is not a weakly prime, because it can be changed into another prime (405354881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202677444 + 202677445.

It is an arithmetic number, because the mean of its divisors is an integer number (202677445).

Almost surely, 2^405354889 is an apocalyptic number.

It is an amenable number.

405354889 is a deficient number, since it is larger than the sum of its proper divisors (1).

405354889 is an equidigital number, since it uses as much as digits as its factorization.

405354889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 405354889 is about 20133.4271548587. The cubic root of 405354889 is about 740.0796657597.

The spelling of 405354889 in words is "four hundred five million, three hundred fifty-four thousand, eight hundred eighty-nine".