405038047 has 2 divisors, whose sum is σ = 405038048. Its totient is φ = 405038046.

The previous prime is 405037979. The next prime is 405038063. The reversal of 405038047 is 740830504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405038047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405038087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202519023 + 202519024.

It is an arithmetic number, because the mean of its divisors is an integer number (202519024).

Almost surely, 2^405038047 is an apocalyptic number.

405038047 is a deficient number, since it is larger than the sum of its proper divisors (1).

405038047 is an equidigital number, since it uses as much as digits as its factorization.

405038047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 405038047 is about 20125.5570606133. The cubic root of 405038047 is about 739.8867899615.

The spelling of 405038047 in words is "four hundred five million, thirty-eight thousand, forty-seven".