9639445 has 8 divisors (see below), whose sum is σ = 11606400. Its totient is φ = 7685520.

The previous prime is 9639437. The next prime is 9639449. The reversal of 9639445 is 5449369.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9639445 - 2³ = 9639437 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9639398 and 9639407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9639449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545 + ... + 4654.

It is an arithmetic number, because the mean of its divisors is an integer number (1450800).

Almost surely, 2^9639445 is an apocalyptic number.

It is an amenable number.

9639445 is a deficient number, since it is larger than the sum of its proper divisors (1966955).

9639445 is a wasteful number, since it uses less digits than its factorization.

9639445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515.

The product of its digits is 116640, while the sum is 40.

The square root of 9639445 is about 3104.7455612336. The cubic root of 9639445 is about 212.8224033384.

The spelling of 9639445 in words is "nine million, six hundred thirty-nine thousand, four hundred forty-five".