2991245917 has 4 divisors (see below), whose sum is σ = 3263177376. Its totient is φ = 2719314460.

The previous prime is 2991245911. The next prime is 2991245921. The reversal of 2991245917 is 7195421992.

2991245917 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2991245917 - 2¹¹ = 2991243869 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 (2991245911) 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, 135965713 + ... + 135965734.

It is an arithmetic number, because the mean of its divisors is an integer number (815794344).

Almost surely, 2^2991245917 is an apocalyptic number.

It is an amenable number.

2991245917 is a deficient number, since it is larger than the sum of its proper divisors (271931459).

2991245917 is a wasteful number, since it uses less digits than its factorization.

2991245917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271931458.

The product of its digits is 408240, while the sum is 49.

The square root of 2991245917 is about 54692.2838890460. The cubic root of 2991245917 is about 1440.8453621983.

The spelling of 2991245917 in words is "two billion, nine hundred ninety-one million, two hundred forty-five thousand, nine hundred seventeen".