2447991311 has 2 divisors, whose sum is σ = 2447991312. Its totient is φ = 2447991310.

The previous prime is 2447991281. The next prime is 2447991317. The reversal of 2447991311 is 1131997442.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2447991311 - 2¹⁰ = 2447990287 is a prime.

It is a super-2 number, since 2×2447991311² = 11985322917462997442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2447991317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1223995655 + 1223995656.

It is an arithmetic number, because the mean of its divisors is an integer number (1223995656).

Almost surely, 2^2447991311 is an apocalyptic number.

2447991311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2447991311 is an equidigital number, since it uses as much as digits as its factorization.

2447991311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 2447991311 is about 49477.1796993321. The cubic root of 2447991311 is about 1347.7312255989.

The spelling of 2447991311 in words is "two billion, four hundred forty-seven million, nine hundred ninety-one thousand, three hundred eleven".