401023039 has 4 divisors (see below), whose sum is σ = 406099360. Its totient is φ = 395946720.

The previous prime is 401023001. The next prime is 401023067. The reversal of 401023039 is 930320104.

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 401023039 - 2²⁷ = 266805311 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 (401023079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538042 + ... + 2538199.

It is an arithmetic number, because the mean of its divisors is an integer number (101524840).

Almost surely, 2^401023039 is an apocalyptic number.

401023039 is a deficient number, since it is larger than the sum of its proper divisors (5076321).

401023039 is an equidigital number, since it uses as much as digits as its factorization.

401023039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076320.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 401023039 is about 20025.5596426167. The cubic root of 401023039 is about 737.4339162850.

The spelling of 401023039 in words is "four hundred one million, twenty-three thousand, thirty-nine".