2641391287 has 2 divisors, whose sum is σ = 2641391288. Its totient is φ = 2641391286.

The previous prime is 2641391273. The next prime is 2641391297. The reversal of 2641391287 is 7821931462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2641391287 - 2¹¹ = 2641389239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2641391297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320695643 + 1320695644.

It is an arithmetic number, because the mean of its divisors is an integer number (1320695644).

Almost surely, 2^2641391287 is an apocalyptic number.

2641391287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641391287 is an equidigital number, since it uses as much as digits as its factorization.

2641391287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 2641391287 is about 51394.4674746222. The cubic root of 2641391287 is about 1382.3273907892.

The spelling of 2641391287 in words is "two billion, six hundred forty-one million, three hundred ninety-one thousand, two hundred eighty-seven".