405213943 has 2 divisors, whose sum is σ = 405213944. Its totient is φ = 405213942.

The previous prime is 405213881. The next prime is 405213959. The reversal of 405213943 is 349312504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405213943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405210943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202606971 + 202606972.

It is an arithmetic number, because the mean of its divisors is an integer number (202606972).

Almost surely, 2^405213943 is an apocalyptic number.

405213943 is a deficient number, since it is larger than the sum of its proper divisors (1).

405213943 is an equidigital number, since it uses as much as digits as its factorization.

405213943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 405213943 is about 20129.9265522753. The cubic root of 405213943 is about 739.9938780842.

The spelling of 405213943 in words is "four hundred five million, two hundred thirteen thousand, nine hundred forty-three".