9951138 has 12 divisors (see below), whose sum is σ = 21560838. Its totient is φ = 3317040.

The previous prime is 9951127. The next prime is 9951143. The reversal of 9951138 is 8311599.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7601049 + 2350089 = 2757^2 + 1533^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276403 + ... + 276438.

Almost surely, 2^9951138 is an apocalyptic number.

9951138 is an abundant number, since it is smaller than the sum of its proper divisors (11609700).

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

9951138 is a wasteful number, since it uses less digits than its factorization.

9951138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552849 (or 552846 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 9951138 is about 3154.5424390868. The cubic root of 9951138 is about 215.0919959648.

The spelling of 9951138 in words is "nine million, nine hundred fifty-one thousand, one hundred thirty-eight".