2640577 has 2 divisors, whose sum is σ = 2640578. Its totient is φ = 2640576.

The previous prime is 2640571. The next prime is 2640581. The reversal of 2640577 is 7750462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2446096 + 194481 = 1564^2 + 441^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640577 - 2¹¹ = 2638529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320288 + 1320289.

It is an arithmetic number, because the mean of its divisors is an integer number (1320289).

2^2640577 is an apocalyptic number.

It is an amenable number.

2640577 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640577 is an equidigital number, since it uses as much as digits as its factorization.

2640577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 2640577 is about 1624.9852307021. The cubic root of 2640577 is about 138.2185328420.

The spelling of 2640577 in words is "two million, six hundred forty thousand, five hundred seventy-seven".