405353969 has 2 divisors, whose sum is σ = 405353970. Its totient is φ = 405353968.

The previous prime is 405353959. The next prime is 405354023. The reversal of 405353969 is 969353504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266113969 + 139240000 = 16313^2 + 11800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405353969 is a prime.

It is a super-2 number, since 2×405353969² = 328623680368105922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405353959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202676984 + 202676985.

It is an arithmetic number, because the mean of its divisors is an integer number (202676985).

Almost surely, 2^405353969 is an apocalyptic number.

It is an amenable number.

405353969 is a deficient number, since it is larger than the sum of its proper divisors (1).

405353969 is an equidigital number, since it uses as much as digits as its factorization.

405353969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 44.

The square root of 405353969 is about 20133.4043072700. The cubic root of 405353969 is about 740.0791058603.

The spelling of 405353969 in words is "four hundred five million, three hundred fifty-three thousand, nine hundred sixty-nine".