405213047 has 2 divisors, whose sum is σ = 405213048. Its totient is φ = 405213046.

The previous prime is 405213031. The next prime is 405213089. The reversal of 405213047 is 740312504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405213047 - 2⁴ = 405213031 is a prime.

It is a super-2 number, since 2×405213047² = 328395226918048418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405213097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202606523 + 202606524.

It is an arithmetic number, because the mean of its divisors is an integer number (202606524).

Almost surely, 2^405213047 is an apocalyptic number.

405213047 is a deficient number, since it is larger than the sum of its proper divisors (1).

405213047 is an equidigital number, since it uses as much as digits as its factorization.

405213047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 405213047 is about 20129.9042968416. The cubic root of 405213047 is about 739.9933326645.

The spelling of 405213047 in words is "four hundred five million, two hundred thirteen thousand, forty-seven".