9561869 has 2 divisors, whose sum is σ = 9561870. Its totient is φ = 9561868.

The previous prime is 9561863. The next prime is 9561901. The reversal of 9561869 is 9681659.

9561869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6568969 + 2992900 = 2563^2 + 1730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9561869 is a prime.

It is a super-2 number, since 2×9561869² = 182858677546322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9561863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4780934 + 4780935.

It is an arithmetic number, because the mean of its divisors is an integer number (4780935).

Almost surely, 2^9561869 is an apocalyptic number.

It is an amenable number.

9561869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9561869 is an equidigital number, since it uses as much as digits as its factorization.

9561869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 44.

The square root of 9561869 is about 3092.2271908772. The cubic root of 9561869 is about 212.2499499399.

The spelling of 9561869 in words is "nine million, five hundred sixty-one thousand, eight hundred sixty-nine".