405372047 has 2 divisors, whose sum is σ = 405372048. Its totient is φ = 405372046.

The previous prime is 405372031. The next prime is 405372061. The reversal of 405372047 is 740273504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405372047 - 2⁴ = 405372031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405378047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202686023 + 202686024.

It is an arithmetic number, because the mean of its divisors is an integer number (202686024).

Almost surely, 2^405372047 is an apocalyptic number.

405372047 is a deficient number, since it is larger than the sum of its proper divisors (1).

405372047 is an equidigital number, since it uses as much as digits as its factorization.

405372047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 405372047 is about 20133.8532576355. The cubic root of 405372047 is about 740.0901077272.

The spelling of 405372047 in words is "four hundred five million, three hundred seventy-two thousand, forty-seven".