2991289732 has 6 divisors (see below), whose sum is σ = 5234757038. Its totient is φ = 1495644864.

The previous prime is 2991289669. The next prime is 2991289751. The reversal of 2991289732 is 2379821992.

It can be written as a sum of positive squares in only one way, i.e., 2080819456 + 910470276 = 45616^2 + 30174^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2991289732.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373911213 + ... + 373911220.

Almost surely, 2^2991289732 is an apocalyptic number.

It is an amenable number.

2991289732 is a deficient number, since it is larger than the sum of its proper divisors (2243467306).

2991289732 is a wasteful number, since it uses less digits than its factorization.

2991289732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747822437 (or 747822435 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The square root of 2991289732 is about 54692.6844468252. The cubic root of 2991289732 is about 1440.8523972079.

The spelling of 2991289732 in words is "two billion, nine hundred ninety-one million, two hundred eighty-nine thousand, seven hundred thirty-two".