9991059 has 8 divisors (see below), whose sum is σ = 14346192. Its totient is φ = 6148320.

The previous prime is 9991057. The next prime is 9991063. The reversal of 9991059 is 9501999.

9991059 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 a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9991059 - 2¹ = 9991057 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9991059.

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 7 ways as a sum of consecutive naturals, for example, 128052 + ... + 128129.

It is an arithmetic number, because the mean of its divisors is an integer number (1793274).

Almost surely, 2^9991059 is an apocalyptic number.

9991059 is a deficient number, since it is larger than the sum of its proper divisors (4355133).

9991059 is a wasteful number, since it uses less digits than its factorization.

9991059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256197.

The product of its (nonzero) digits is 32805, while the sum is 42.

The square root of 9991059 is about 3160.8636478026. The cubic root of 9991059 is about 215.3792405219.

The spelling of 9991059 in words is "nine million, nine hundred ninety-one thousand, fifty-nine".