2991434 has 4 divisors (see below), whose sum is σ = 4487154. Its totient is φ = 1495716.

The previous prime is 2991433. The next prime is 2991451. The reversal of 2991434 is 4341992.

It is a happy number.

2991434 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 can be written as a sum of positive squares in only one way, i.e., 2356225 + 635209 = 1535^2 + 797^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2991434.

It is not an unprimeable number, because it can be changed into a prime (2991431) 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 as a sum of consecutive naturals, namely, 747857 + ... + 747860.

2^2991434 is an apocalyptic number.

2991434 is a deficient number, since it is larger than the sum of its proper divisors (1495720).

2991434 is a wasteful number, since it uses less digits than its factorization.

2991434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495719.

The product of its digits is 7776, while the sum is 32.

The square root of 2991434 is about 1729.5762486806. The cubic root of 2991434 is about 144.0875560634.

The spelling of 2991434 in words is "two million, nine hundred ninety-one thousand, four hundred thirty-four".