2955991 has 4 divisors (see below), whose sum is σ = 2959632. Its totient is φ = 2952352.

The previous prime is 2955961. The next prime is 2956003. The reversal of 2955991 is 1995592.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2955991 - 2⁹ = 2955479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2955961) 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, 15 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (739908).

2^2955991 is an apocalyptic number.

2955991 is a deficient number, since it is larger than the sum of its proper divisors (3641).

2955991 is a wasteful number, since it uses less digits than its factorization.

2955991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640.

The product of its digits is 36450, while the sum is 40.

The square root of 2955991 is about 1719.2995666841. The cubic root of 2955991 is about 143.5162360680.

The spelling of 2955991 in words is "two million, nine hundred fifty-five thousand, nine hundred ninety-one".