7940549 has 2 divisors, whose sum is σ = 7940550. Its totient is φ = 7940548.

The previous prime is 7940539. The next prime is 7940567. The reversal of 7940549 is 9450497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6340324 + 1600225 = 2518^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940549 - 2⁸ = 7940293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7940539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970274 + 3970275.

It is an arithmetic number, because the mean of its divisors is an integer number (3970275).

Almost surely, 2^7940549 is an apocalyptic number.

It is an amenable number.

7940549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940549 is an equidigital number, since it uses as much as digits as its factorization.

7940549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 7940549 is about 2817.8979754420. The cubic root of 7940549 is about 199.5033426784.

The spelling of 7940549 in words is "seven million, nine hundred forty thousand, five hundred forty-nine".