401943563 has 16 divisors (see below), whose sum is σ = 487710720. Its totient is φ = 323373696.

The previous prime is 401943559. The next prime is 401943587. The reversal of 401943563 is 365349104.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 401943563 - 2² = 401943559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401943593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41168 + ... + 49986.

It is an arithmetic number, because the mean of its divisors is an integer number (30481920).

Almost surely, 2^401943563 is an apocalyptic number.

401943563 is a deficient number, since it is larger than the sum of its proper divisors (85767157).

401943563 is a wasteful number, since it uses less digits than its factorization.

401943563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9226.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 401943563 is about 20048.5301955031. The cubic root of 401943563 is about 737.9977300087.

The spelling of 401943563 in words is "four hundred one million, nine hundred forty-three thousand, five hundred sixty-three".