13097491 has 16 divisors (see below), whose sum is σ = 14823648. Its totient is φ = 11468800.

The previous prime is 13097467. The next prime is 13097501. The reversal of 13097491 is 19479031.

It is a 16-Lehmer number, since φ(13097491) divides (13097491-1)¹⁶.

It is a cyclic number.

It is not a de Polignac number, because 13097491 - 2⁷ = 13097363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13097401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50835 + ... + 51091.

It is an arithmetic number, because the mean of its divisors is an integer number (926478).

Almost surely, 2^13097491 is an apocalyptic number.

13097491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13097491 is a deficient number, since it is larger than the sum of its proper divisors (1726157).

13097491 is a wasteful number, since it uses less digits than its factorization.

13097491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 13097491 is about 3619.0455924180. The cubic root of 13097491 is about 235.7197849607.

The spelling of 13097491 in words is "thirteen million, ninety-seven thousand, four hundred ninety-one".