405013643 has 2 divisors, whose sum is σ = 405013644. Its totient is φ = 405013642.

The previous prime is 405013639. The next prime is 405013657. The reversal of 405013643 is 346310504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405013643 - 2² = 405013639 is a prime.

It is a super-2 number, since 2×405013643² = 328072102032262898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405013673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202506821 + 202506822.

It is an arithmetic number, because the mean of its divisors is an integer number (202506822).

Almost surely, 2^405013643 is an apocalyptic number.

405013643 is a deficient number, since it is larger than the sum of its proper divisors (1).

405013643 is an equidigital number, since it uses as much as digits as its factorization.

405013643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 405013643 is about 20124.9507577037. The cubic root of 405013643 is about 739.8719299914.

It can be divided in two parts, 40501 and 3643, that added together give a palindrome (44144).

The spelling of 405013643 in words is "four hundred five million, thirteen thousand, six hundred forty-three".