405500047 has 2 divisors, whose sum is σ = 405500048. Its totient is φ = 405500046.

The previous prime is 405500027. The next prime is 405500077. The reversal of 405500047 is 740005504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405500047 - 2¹⁹ = 404975759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405499994 and 405500030.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405500027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202750023 + 202750024.

It is an arithmetic number, because the mean of its divisors is an integer number (202750024).

Almost surely, 2^405500047 is an apocalyptic number.

405500047 is a deficient number, since it is larger than the sum of its proper divisors (1).

405500047 is an equidigital number, since it uses as much as digits as its factorization.

405500047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 405500047 is about 20137.0317326065. The cubic root of 405500047 is about 740.1679963116.

The spelling of 405500047 in words is "four hundred five million, five hundred thousand, forty-seven".