2065761391 has 2 divisors, whose sum is σ = 2065761392. Its totient is φ = 2065761390.

The previous prime is 2065761371. The next prime is 2065761419. The reversal of 2065761391 is 1931675602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2065761391 - 2⁵ = 2065761359 is a prime.

It is a super-3 number, since 3×2065761391³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2065761331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032880695 + 1032880696.

It is an arithmetic number, because the mean of its divisors is an integer number (1032880696).

Almost surely, 2^2065761391 is an apocalyptic number.

2065761391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065761391 is an equidigital number, since it uses as much as digits as its factorization.

2065761391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 2065761391 is about 45450.6478611692. The cubic root of 2065761391 is about 1273.5814321002.

The spelling of 2065761391 in words is "two billion, sixty-five million, seven hundred sixty-one thousand, three hundred ninety-one".