2991917107 has 4 divisors (see below), whose sum is σ = 3013756056. Its totient is φ = 2970078160.

The previous prime is 2991917101. The next prime is 2991917111. The reversal of 2991917107 is 7017191992.

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 2991917107 - 2¹⁹ = 2991392819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2991917101) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10919269 + ... + 10919542.

It is an arithmetic number, because the mean of its divisors is an integer number (753439014).

Almost surely, 2^2991917107 is an apocalyptic number.

2991917107 is a deficient number, since it is larger than the sum of its proper divisors (21838949).

2991917107 is a wasteful number, since it uses less digits than its factorization.

2991917107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21838948.

The product of its (nonzero) digits is 71442, while the sum is 46.

The square root of 2991917107 is about 54698.4196023980. The cubic root of 2991917107 is about 1440.9531220528.

The spelling of 2991917107 in words is "two billion, nine hundred ninety-one million, nine hundred seventeen thousand, one hundred seven".