13020091 has 4 divisors (see below), whose sum is σ = 14880112. Its totient is φ = 11160072.

The previous prime is 13020071. The next prime is 13020103. The reversal of 13020091 is 19002031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19002031 = 4273 ⋅4447.

It is not a de Polignac number, because 13020091 - 2²¹ = 10922939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13020071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930000 + ... + 930013.

It is an arithmetic number, because the mean of its divisors is an integer number (3720028).

Almost surely, 2^13020091 is an apocalyptic number.

13020091 is a deficient number, since it is larger than the sum of its proper divisors (1860021).

13020091 is an equidigital number, since it uses as much as digits as its factorization.

13020091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860020.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 13020091 is about 3608.3363202451. The cubic root of 13020091 is about 235.2545363359.

The spelling of 13020091 in words is "thirteen million, twenty thousand, ninety-one".