2065891213 has 2 divisors, whose sum is σ = 2065891214. Its totient is φ = 2065891212.

The previous prime is 2065891193. The next prime is 2065891297. The reversal of 2065891213 is 3121985602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2064975364 + 915849 = 45442^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2065891213 - 2¹³ = 2065883021 is a prime.

It is a super-2 number, since 2×2065891213² = 8535813007901222738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2065811213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032945606 + 1032945607.

It is an arithmetic number, because the mean of its divisors is an integer number (1032945607).

Almost surely, 2^2065891213 is an apocalyptic number.

It is an amenable number.

2065891213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065891213 is an equidigital number, since it uses as much as digits as its factorization.

2065891213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2065891213 is about 45452.0760031926. The cubic root of 2065891213 is about 1273.6081107905.

The spelling of 2065891213 in words is "two billion, sixty-five million, eight hundred ninety-one thousand, two hundred thirteen".