2872091 has 4 divisors (see below), whose sum is σ = 2942184. Its totient is φ = 2802000.

The previous prime is 2872081. The next prime is 2872109. The reversal of 2872091 is 1902782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2872091 - 2⁶ = 2872027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2872081) 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 3 ways as a sum of consecutive naturals, for example, 34985 + ... + 35066.

It is an arithmetic number, because the mean of its divisors is an integer number (735546).

2^2872091 is an apocalyptic number.

2872091 is a deficient number, since it is larger than the sum of its proper divisors (70093).

2872091 is an equidigital number, since it uses as much as digits as its factorization.

2872091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70092.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2872091 is about 1694.7244613801. The cubic root of 2872091 is about 142.1453744950.

The spelling of 2872091 in words is "two million, eight hundred seventy-two thousand, ninety-one".