9991053 has 16 divisors (see below), whose sum is σ = 15672960. Its totient is φ = 6268608.

The previous prime is 9991027. The next prime is 9991057. The reversal of 9991053 is 3501999.

9991053 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9991053 - 2⁶ = 9990989 is a prime.

It is a super-2 number, since 2×9991053² = 199642280097618, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9990999 and 9991017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10425 + ... + 11342.

It is an arithmetic number, because the mean of its divisors is an integer number (979560).

Almost surely, 2^9991053 is an apocalyptic number.

It is an amenable number.

9991053 is a deficient number, since it is larger than the sum of its proper divisors (5681907).

9991053 is a wasteful number, since it uses less digits than its factorization.

9991053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21793 (or 21787 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 9991053 is about 3160.8626986948. The cubic root of 9991053 is about 215.3791974075.

The spelling of 9991053 in words is "nine million, nine hundred ninety-one thousand, fifty-three".