13010991 has 16 divisors (see below), whose sum is σ = 20870400. Its totient is φ = 7043328.

The previous prime is 13010971. The next prime is 13010993. The reversal of 13010991 is 19901031.

It is not a de Polignac number, because 13010991 - 2⁶ = 13010927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13010993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15906 + ... + 16703.

It is an arithmetic number, because the mean of its divisors is an integer number (1304400).

Almost surely, 2^13010991 is an apocalyptic number.

13010991 is a deficient number, since it is larger than the sum of its proper divisors (7859409).

13010991 is a wasteful number, since it uses less digits than its factorization.

13010991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32638.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 13010991 is about 3607.0751309059. The cubic root of 13010991 is about 235.1997155406.

The spelling of 13010991 in words is "thirteen million, ten thousand, nine hundred ninety-one".