2991512747 has 2 divisors, whose sum is σ = 2991512748. Its totient is φ = 2991512746.

The previous prime is 2991512743. The next prime is 2991512753. The reversal of 2991512747 is 7472151992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2991512747 - 2² = 2991512743 is a prime.

It is not a weakly prime, because it can be changed into another prime (2991512743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495756373 + 1495756374.

It is an arithmetic number, because the mean of its divisors is an integer number (1495756374).

Almost surely, 2^2991512747 is an apocalyptic number.

2991512747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991512747 is an equidigital number, since it uses as much as digits as its factorization.

2991512747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 2991512747 is about 54694.7232098308. The cubic root of 2991512747 is about 1440.8882038042. Note that the first 3 decimals are identical.

The spelling of 2991512747 in words is "two billion, nine hundred ninety-one million, five hundred twelve thousand, seven hundred forty-seven".