2640313289 has 2 divisors, whose sum is σ = 2640313290. Its totient is φ = 2640313288.

The previous prime is 2640313177. The next prime is 2640313297. The reversal of 2640313289 is 9823130462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1757034889 + 883278400 = 41917^2 + 29720^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640313289 - 2¹² = 2640309193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640313889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320156644 + 1320156645.

It is an arithmetic number, because the mean of its divisors is an integer number (1320156645).

Almost surely, 2^2640313289 is an apocalyptic number.

It is an amenable number.

2640313289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640313289 is an equidigital number, since it uses as much as digits as its factorization.

2640313289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 2640313289 is about 51383.9789136653. The cubic root of 2640313289 is about 1382.1393145363.

The spelling of 2640313289 in words is "two billion, six hundred forty million, three hundred thirteen thousand, two hundred eighty-nine".