2050091 has 4 divisors (see below), whose sum is σ = 2064000. Its totient is φ = 2036184.

The previous prime is 2050079. The next prime is 2050099. The reversal of 2050091 is 1900502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1900502 = 2 ⋅950251.

It is a cyclic number.

It is not a de Polignac number, because 2050091 - 2¹⁰ = 2049067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2050099) 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 3 ways as a sum of consecutive naturals, for example, 6731 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (516000).

2^2050091 is an apocalyptic number.

2050091 is a deficient number, since it is larger than the sum of its proper divisors (13909).

2050091 is a wasteful number, since it uses less digits than its factorization.

2050091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13908.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 2050091 is about 1431.8138845534. The cubic root of 2050091 is about 127.0352889308.

Adding to 2050091 its reverse (1900502), we get a palindrome (3950593).

It can be divided in two parts, 20 and 50091, that multiplied together give a triangular number (1001820 = T₁₄₁₅).

The spelling of 2050091 in words is "two million, fifty thousand, ninety-one".