405287969 has 2 divisors, whose sum is σ = 405287970. Its totient is φ = 405287968.

The previous prime is 405287957. The next prime is 405288001. The reversal of 405287969 is 969782504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376825744 + 28462225 = 19412^2 + 5335^2 .

It is a cyclic number.

It is not a de Polignac number, because 405287969 - 2⁸ = 405287713 is a prime.

It is a super-2 number, since 2×405287969² = 328516675632289922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405287369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202643984 + 202643985.

It is an arithmetic number, because the mean of its divisors is an integer number (202643985).

Almost surely, 2^405287969 is an apocalyptic number.

It is an amenable number.

405287969 is a deficient number, since it is larger than the sum of its proper divisors (1).

405287969 is an equidigital number, since it uses as much as digits as its factorization.

405287969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 405287969 is about 20131.7651734765. The cubic root of 405287969 is about 740.0389369578.

The spelling of 405287969 in words is "four hundred five million, two hundred eighty-seven thousand, nine hundred sixty-nine".