9961138 has 16 divisors (see below), whose sum is σ = 16609536. Its totient is φ = 4441840.

The previous prime is 9961129. The next prime is 9961141. The reversal of 9961138 is 8311699.

It is a junction number, because it is equal to n+sod(n) for n = 9961097 and 9961106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106 + ... + 5437.

It is an arithmetic number, because the mean of its divisors is an integer number (1038096).

Almost surely, 2^9961138 is an apocalyptic number.

9961138 is a deficient number, since it is larger than the sum of its proper divisors (6648398).

9961138 is a wasteful number, since it uses less digits than its factorization.

9961138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8609.

The product of its digits is 11664, while the sum is 37.

The square root of 9961138 is about 3156.1270570115. The cubic root of 9961138 is about 215.1640212236.

The spelling of 9961138 in words is "nine million, nine hundred sixty-one thousand, one hundred thirty-eight".