401043439 has 4 divisors (see below), whose sum is σ = 401104480. Its totient is φ = 400982400.

The previous prime is 401043437. The next prime is 401043449. The reversal of 401043439 is 934340104.

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 401043439 - 2¹ = 401043437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401043437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19287 + ... + 34264.

It is an arithmetic number, because the mean of its divisors is an integer number (100276120).

Almost surely, 2^401043439 is an apocalyptic number.

401043439 is a deficient number, since it is larger than the sum of its proper divisors (61041).

401043439 is an equidigital number, since it uses as much as digits as its factorization.

401043439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61040.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 401043439 is about 20026.0689852003. The cubic root of 401043439 is about 737.4464204683.

The spelling of 401043439 in words is "four hundred one million, forty-three thousand, four hundred thirty-nine".