9961895 has 16 divisors (see below), whose sum is σ = 12279168. Its totient is φ = 7756320.

The previous prime is 9961879. The next prime is 9961907. The reversal of 9961895 is 5981699.

It is not a de Polignac number, because 9961895 - 2⁴ = 9961879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43772 + ... + 43998.

It is an arithmetic number, because the mean of its divisors is an integer number (767448).

Almost surely, 2^9961895 is an apocalyptic number.

9961895 is a deficient number, since it is larger than the sum of its proper divisors (2317273).

9961895 is a wasteful number, since it uses less digits than its factorization.

9961895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 174960, while the sum is 47.

The square root of 9961895 is about 3156.2469801966. The cubic root of 9961895 is about 215.1694715726.

The spelling of 9961895 in words is "nine million, nine hundred sixty-one thousand, eight hundred ninety-five".