10439509 has 4 divisors (see below), whose sum is σ = 10448704. Its totient is φ = 10430316.

The previous prime is 10439501. The next prime is 10439549. The reversal of 10439509 is 90593401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90593401 = 191 ⋅474311.

It is a cyclic number.

It is not a de Polignac number, because 10439509 - 2³ = 10439501 is a prime.

It is a super-2 number, since 2×10439509² = 217966696322162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10439501) 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, 2607 + ... + 5260.

It is an arithmetic number, because the mean of its divisors is an integer number (2612176).

Almost surely, 2^10439509 is an apocalyptic number.

It is an amenable number.

10439509 is a deficient number, since it is larger than the sum of its proper divisors (9195).

10439509 is an equidigital number, since it uses as much as digits as its factorization.

10439509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9194.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 10439509 is about 3231.0229030448. The cubic root of 10439509 is about 218.5546365680.

The spelling of 10439509 in words is "ten million, four hundred thirty-nine thousand, five hundred nine".