13191090 has 64 divisors (see below), whose sum is σ = 35085312. Its totient is φ = 3147200.

The previous prime is 13191037. The next prime is 13191091. The reversal of 13191090 is 9019131.

13191090 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 self number, because there is not a number n which added to its sum of digits gives 13191090.

It is not an unprimeable number, because it can be changed into a prime (13191091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23149 + ... + 23711.

It is an arithmetic number, because the mean of its divisors is an integer number (548208).

Almost surely, 2^13191090 is an apocalyptic number.

13191090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13191090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17542656).

13191090 is an abundant number, since it is smaller than the sum of its proper divisors (21894222).

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

13191090 is a wasteful number, since it uses less digits than its factorization.

13191090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

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

The square root of 13191090 is about 3631.9540195327. The cubic root of 13191090 is about 236.2799631659.

The spelling of 13191090 in words is "thirteen million, one hundred ninety-one thousand, ninety".