9665139 has 16 divisors (see below), whose sum is σ = 14192640. Its totient is φ = 5801760.

The previous prime is 9665137. The next prime is 9665141. The reversal of 9665139 is 9315669.

It is an interprime number because it is at equal distance from previous prime (9665137) and next prime (9665141).

It is not a de Polignac number, because 9665139 - 2¹ = 9665137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9665097 and 9665106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2254 + ... + 4940.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^9665139 is an apocalyptic number.

9665139 is a deficient number, since it is larger than the sum of its proper divisors (4527501).

9665139 is a wasteful number, since it uses less digits than its factorization.

9665139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810.

The product of its digits is 43740, while the sum is 39.

The square root of 9665139 is about 3108.8806667352. The cubic root of 9665139 is about 213.0113287192.

It can be divided in two parts, 966 and 5139, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 9665139 in words is "nine million, six hundred sixty-five thousand, one hundred thirty-nine".