2991064447 has 4 divisors (see below), whose sum is σ = 3418359376. Its totient is φ = 2563769520.

The previous prime is 2991064429. The next prime is 2991064469. The reversal of 2991064447 is 7444601992.

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 2991064447 - 2³¹ = 843580799 is a prime.

It is a super-2 number, since 2×2991064447² = 17892933052214831618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2991064397 and 2991064406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991065447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213647454 + ... + 213647467.

It is an arithmetic number, because the mean of its divisors is an integer number (854589844).

Almost surely, 2^2991064447 is an apocalyptic number.

2991064447 is a deficient number, since it is larger than the sum of its proper divisors (427294929).

2991064447 is an equidigital number, since it uses as much as digits as its factorization.

2991064447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427294928.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 2991064447 is about 54690.6248547226. The cubic root of 2991064447 is about 1440.8162243403.

The spelling of 2991064447 in words is "two billion, nine hundred ninety-one million, sixty-four thousand, four hundred forty-seven".