400405463 has 2 divisors, whose sum is σ = 400405464. Its totient is φ = 400405462.

The previous prime is 400405451. The next prime is 400405507. The reversal of 400405463 is 364504004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400405463 - 2¹⁴ = 400389079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400405433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200202731 + 200202732.

It is an arithmetic number, because the mean of its divisors is an integer number (200202732).

Almost surely, 2^400405463 is an apocalyptic number.

400405463 is a deficient number, since it is larger than the sum of its proper divisors (1).

400405463 is an equidigital number, since it uses as much as digits as its factorization.

400405463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 400405463 is about 20010.1340075473. The cubic root of 400405463 is about 737.0551720672.

Adding to 400405463 its reverse (364504004), we get a palindrome (764909467).

The spelling of 400405463 in words is "four hundred million, four hundred five thousand, four hundred sixty-three".