8401439 has 4 divisors (see below), whose sum is σ = 8843640. Its totient is φ = 7959240.

The previous prime is 8401429. The next prime is 8401447. The reversal of 8401439 is 9341048.

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 8401439 - 2¹⁶ = 8335903 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 (8401409) 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, 221072 + ... + 221109.

It is an arithmetic number, because the mean of its divisors is an integer number (2210910).

Almost surely, 2^8401439 is an apocalyptic number.

8401439 is a deficient number, since it is larger than the sum of its proper divisors (442201).

8401439 is a wasteful number, since it uses less digits than its factorization.

8401439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442200.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 8401439 is about 2898.5235896918. The cubic root of 8401439 is about 203.2908785919.

The spelling of 8401439 in words is "eight million, four hundred one thousand, four hundred thirty-nine".