9709439 has 4 divisors (see below), whose sum is σ = 9854424. Its totient is φ = 9564456.

The previous prime is 9709411. The next prime is 9709477. The reversal of 9709439 is 9349079.

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 9709439 - 2¹⁶ = 9643903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9709396 and 9709405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9709039) 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, 72392 + ... + 72525.

It is an arithmetic number, because the mean of its divisors is an integer number (2463606).

Almost surely, 2^9709439 is an apocalyptic number.

9709439 is a deficient number, since it is larger than the sum of its proper divisors (144985).

9709439 is a wasteful number, since it uses less digits than its factorization.

9709439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144984.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 9709439 is about 3115.9972721426. The cubic root of 9709439 is about 213.3362773574.

It can be divided in two parts, 9 and 709439, that multiplied together give a triangular number (6384951 = T₃₅₇₃).

The spelling of 9709439 in words is "nine million, seven hundred nine thousand, four hundred thirty-nine".