2991935813 has 8 divisors (see below), whose sum is σ = 3005898336. Its totient is φ = 2977990000.

The previous prime is 2991935741. The next prime is 2991935851. The reversal of 2991935813 is 3185391992.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2991935813 is a prime.

It is a super-2 number, since 2×2991935813² = 17903359818223941938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991985813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481595 + ... + 487767.

It is an arithmetic number, because the mean of its divisors is an integer number (375737292).

Almost surely, 2^2991935813 is an apocalyptic number.

It is an amenable number.

2991935813 is a deficient number, since it is larger than the sum of its proper divisors (13962523).

2991935813 is a wasteful number, since it uses less digits than its factorization.

2991935813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355.

The product of its digits is 524880, while the sum is 50.

The square root of 2991935813 is about 54698.5905942740. The cubic root of 2991935813 is about 1440.9561250786.

The spelling of 2991935813 in words is "two billion, nine hundred ninety-one million, nine hundred thirty-five thousand, eight hundred thirteen".