405356443 has 2 divisors, whose sum is σ = 405356444. Its totient is φ = 405356442.

The previous prime is 405356429. The next prime is 405356489. The reversal of 405356443 is 344653504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405356443 - 2²¹ = 403259291 is a prime.

It is a super-2 number, since 2×405356443² = 328627691763224498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405356399 and 405356408.

It is not a weakly prime, because it can be changed into another prime (405356843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202678221 + 202678222.

It is an arithmetic number, because the mean of its divisors is an integer number (202678222).

Almost surely, 2^405356443 is an apocalyptic number.

405356443 is a deficient number, since it is larger than the sum of its proper divisors (1).

405356443 is an equidigital number, since it uses as much as digits as its factorization.

405356443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 34.

The square root of 405356443 is about 20133.4657473571. The cubic root of 405356443 is about 740.0806115008.

The spelling of 405356443 in words is "four hundred five million, three hundred fifty-six thousand, four hundred forty-three".