405618943 has 4 divisors (see below), whose sum is σ = 410753440. Its totient is φ = 400484448.

The previous prime is 405618931. The next prime is 405618947. The reversal of 405618943 is 349816504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405618943 - 2⁹ = 405618431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405618896 and 405618905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405618947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567130 + ... + 2567287.

It is an arithmetic number, because the mean of its divisors is an integer number (102688360).

Almost surely, 2^405618943 is an apocalyptic number.

405618943 is a deficient number, since it is larger than the sum of its proper divisors (5134497).

405618943 is an equidigital number, since it uses as much as digits as its factorization.

405618943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134496.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 405618943 is about 20139.9836891692. The cubic root of 405618943 is about 740.2403303882.

The spelling of 405618943 in words is "four hundred five million, six hundred eighteen thousand, nine hundred forty-three".