2991384931 has 2 divisors, whose sum is σ = 2991384932. Its totient is φ = 2991384930.

The previous prime is 2991384919. The next prime is 2991384937. The reversal of 2991384931 is 1394831992.

2991384931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2991384931 - 2¹⁵ = 2991352163 is a prime.

It is a super-2 number, since 2×2991384931² = 17896767610827749522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2991384937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495692465 + 1495692466.

It is an arithmetic number, because the mean of its divisors is an integer number (1495692466).

Almost surely, 2^2991384931 is an apocalyptic number.

2991384931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991384931 is an equidigital number, since it uses as much as digits as its factorization.

2991384931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The square root of 2991384931 is about 54693.5547482516. The cubic root of 2991384931 is about 1440.8676822816.

The spelling of 2991384931 in words is "two billion, nine hundred ninety-one million, three hundred eighty-four thousand, nine hundred thirty-one".