2091879 has 8 divisors (see below), whose sum is σ = 3099120. Its totient is φ = 1394568.

The previous prime is 2091877. The next prime is 2091889. The reversal of 2091879 is 9781902.

It is a happy number.

It is not a de Polignac number, because 2091879 - 2¹ = 2091877 is a prime.

It is a super-3 number, since 3×2091879³ = 27461922370359433317, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38712 + ... + 38765.

It is an arithmetic number, because the mean of its divisors is an integer number (387390).

2^2091879 is an apocalyptic number.

2091879 is a deficient number, since it is larger than the sum of its proper divisors (1007241).

2091879 is an equidigital number, since it uses as much as digits as its factorization.

2091879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77486 (or 77480 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2091879 is about 1446.3329492202. The cubic root of 2091879 is about 127.8926305014.

The spelling of 2091879 in words is "two million, ninety-one thousand, eight hundred seventy-nine".