9959895 has 64 divisors (see below), whose sum is σ = 20390400. Its totient is φ = 4561920.

The previous prime is 9959879. The next prime is 9959899. The reversal of 9959895 is 5989599.

It is not a de Polignac number, because 9959895 - 2⁴ = 9959879 is a prime.

It is a super-2 number, since 2×9959895² = 198399016822050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28039 + ... + 28391.

It is an arithmetic number, because the mean of its divisors is an integer number (318600).

Almost surely, 2^9959895 is an apocalyptic number.

9959895 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9959895 is an abundant number, since it is smaller than the sum of its proper divisors (10430505).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9959895 is a wasteful number, since it uses less digits than its factorization.

9959895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 54.

The square root of 9959895 is about 3155.9301323065. The cubic root of 9959895 is about 215.1550711082.

The spelling of 9959895 in words is "nine million, nine hundred fifty-nine thousand, eight hundred ninety-five".