2113091 has 2 divisors, whose sum is σ = 2113092. Its totient is φ = 2113090.

The previous prime is 2113087. The next prime is 2113109. The reversal of 2113091 is 1903112.

It is a happy number.

Together with next prime (2113109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2113091 - 2² = 2113087 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2113291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056545 + 1056546.

It is an arithmetic number, because the mean of its divisors is an integer number (1056546).

2^2113091 is an apocalyptic number.

2113091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113091 is an equidigital number, since it uses as much as digits as its factorization.

2113091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 2113091 is about 1453.6474813379. The cubic root of 2113091 is about 128.3234616945.

It can be divided in two parts, 21 and 13091, that multiplied together give a triangular number (274911 = T₇₄₁).

The spelling of 2113091 in words is "two million, one hundred thirteen thousand, ninety-one".