9665869 has 4 divisors (see below), whose sum is σ = 9802080. Its totient is φ = 9529660.

The previous prime is 9665863. The next prime is 9665891. The reversal of 9665869 is 9685669.

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 an emirpimes, since its reverse is a distinct semiprime: 9685669 = 7 ⋅1383667.

It is a cyclic number.

It is not a de Polignac number, because 9665869 - 2⁵ = 9665837 is a prime.

It is a super-2 number, since 2×9665869² = 186858047050322, which contains 22 as substring.

It is a Duffinian number.

9665869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665863) 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, 67999 + ... + 68140.

It is an arithmetic number, because the mean of its divisors is an integer number (2450520).

Almost surely, 2^9665869 is an apocalyptic number.

It is an amenable number.

9665869 is a deficient number, since it is larger than the sum of its proper divisors (136211).

9665869 is a wasteful number, since it uses less digits than its factorization.

9665869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136210.

The product of its digits is 699840, while the sum is 49.

The square root of 9665869 is about 3108.9980701184. The cubic root of 9665869 is about 213.0166914411.

The spelling of 9665869 in words is "nine million, six hundred sixty-five thousand, eight hundred sixty-nine".