2911081 has 2 divisors, whose sum is σ = 2911082. Its totient is φ = 2911080.

The previous prime is 2911079. The next prime is 2911091. The reversal of 2911081 is 1801192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 477481 = 1560^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2911081 - 2¹ = 2911079 is a prime.

It is a super-3 number, since 3×2911081³ = 74008929753302233323, which contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 2911079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2911061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1455540 + 1455541.

It is an arithmetic number, because the mean of its divisors is an integer number (1455541).

2^2911081 is an apocalyptic number.

It is an amenable number.

2911081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2911081 is an equidigital number, since it uses as much as digits as its factorization.

2911081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 2911081 is about 1706.1890282146. The cubic root of 2911081 is about 142.7857158647.

The spelling of 2911081 in words is "two million, nine hundred eleven thousand, eighty-one".