2991955 has 8 divisors (see below), whose sum is σ = 3746592. Its totient is φ = 2289408.

The previous prime is 2991929. The next prime is 2991971. The reversal of 2991955 is 5591992.

2991955 = T₃₂ + T₃₃ + ... + T₂₆₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2991955 - 2¹³ = 2983763 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12894 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (468324).

2^2991955 is an apocalyptic number.

2991955 is a deficient number, since it is larger than the sum of its proper divisors (754637).

2991955 is a wasteful number, since it uses less digits than its factorization.

2991955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26045.

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

The square root of 2991955 is about 1729.7268570500. The cubic root of 2991955 is about 144.0959205310.

The spelling of 2991955 in words is "two million, nine hundred ninety-one thousand, nine hundred fifty-five".