2891327969 has 2 divisors, whose sum is σ = 2891327970. Its totient is φ = 2891327968.

The previous prime is 2891327941. The next prime is 2891328007. The reversal of 2891327969 is 9697231982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2471282944 + 420045025 = 49712^2 + 20495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2891327969 - 2¹² = 2891323873 is a prime.

It is a super-2 number, since 2×2891327969² = 16719554848643329922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2891327669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445663984 + 1445663985.

It is an arithmetic number, because the mean of its divisors is an integer number (1445663985).

Almost surely, 2^2891327969 is an apocalyptic number.

It is an amenable number.

2891327969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2891327969 is an equidigital number, since it uses as much as digits as its factorization.

2891327969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The square root of 2891327969 is about 53771.0700005124. The cubic root of 2891327969 is about 1424.6202692306.

The spelling of 2891327969 in words is "two billion, eight hundred ninety-one million, three hundred twenty-seven thousand, nine hundred sixty-nine".