2947516991 has 2 divisors, whose sum is σ = 2947516992. Its totient is φ = 2947516990.

The previous prime is 2947516919. The next prime is 2947517009. The reversal of 2947516991 is 1996157492.

Together with previous prime (2947516919) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2947516991 - 2²⁶ = 2880408127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2947416991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1473758495 + 1473758496.

It is an arithmetic number, because the mean of its divisors is an integer number (1473758496).

Almost surely, 2^2947516991 is an apocalyptic number.

2947516991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2947516991 is an equidigital number, since it uses as much as digits as its factorization.

2947516991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 53.

The square root of 2947516991 is about 54291.0396934890. The cubic root of 2947516991 is about 1433.7896435323.

The spelling of 2947516991 in words is "two billion, nine hundred forty-seven million, five hundred sixteen thousand, nine hundred ninety-one".