2540693 has 2 divisors, whose sum is σ = 2540694. Its totient is φ = 2540692.

The previous prime is 2540689. The next prime is 2540723. The reversal of 2540693 is 3960452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2053489 + 487204 = 1433^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540693 - 2² = 2540689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270346 + 1270347.

It is an arithmetic number, because the mean of its divisors is an integer number (1270347).

2^2540693 is an apocalyptic number.

It is an amenable number.

2540693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540693 is an equidigital number, since it uses as much as digits as its factorization.

2540693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2540693 is about 1593.9551436599. The cubic root of 2540693 is about 136.4533064494.

The spelling of 2540693 in words is "two million, five hundred forty thousand, six hundred ninety-three".