2991371 has 4 divisors (see below), whose sum is σ = 3167352. Its totient is φ = 2815392.

The previous prime is 2991367. The next prime is 2991377. The reversal of 2991371 is 1731992.

It is a happy number.

2991371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2991371 - 2² = 2991367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2991377) 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, 87965 + ... + 87998.

It is an arithmetic number, because the mean of its divisors is an integer number (791838).

2^2991371 is an apocalyptic number.

2991371 is a deficient number, since it is larger than the sum of its proper divisors (175981).

2991371 is a wasteful number, since it uses less digits than its factorization.

2991371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175980.

The product of its digits is 3402, while the sum is 32.

The square root of 2991371 is about 1729.5580360312. The cubic root of 2991371 is about 144.0865445552.

The spelling of 2991371 in words is "two million, nine hundred ninety-one thousand, three hundred seventy-one".