9991054 has 4 divisors (see below), whose sum is σ = 14986584. Its totient is φ = 4995526.

The previous prime is 9991027. The next prime is 9991057. The reversal of 9991054 is 4501999.

9991054 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 2497762 + ... + 2497765.

It is an arithmetic number, because the mean of its divisors is an integer number (3746646).

Almost surely, 2^9991054 is an apocalyptic number.

9991054 is a deficient number, since it is larger than the sum of its proper divisors (4995530).

9991054 is a wasteful number, since it uses less digits than its factorization.

9991054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995529.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 9991054 is about 3160.8628568794. The cubic root of 9991054 is about 215.3792045933.

The spelling of 9991054 in words is "nine million, nine hundred ninety-one thousand, fifty-four".