405470047 has 2 divisors, whose sum is σ = 405470048. Its totient is φ = 405470046.

The previous prime is 405470011. The next prime is 405470057. The reversal of 405470047 is 740074504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405470047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405470057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202735023 + 202735024.

It is an arithmetic number, because the mean of its divisors is an integer number (202735024).

Almost surely, 2^405470047 is an apocalyptic number.

405470047 is a deficient number, since it is larger than the sum of its proper divisors (1).

405470047 is an equidigital number, since it uses as much as digits as its factorization.

405470047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 405470047 is about 20136.2868225500. The cubic root of 405470047 is about 740.1497426454.

The spelling of 405470047 in words is "four hundred five million, four hundred seventy thousand, forty-seven".