7280840549 has 2 divisors, whose sum is σ = 7280840550. Its totient is φ = 7280840548.

The previous prime is 7280840503. The next prime is 7280840579. The reversal of 7280840549 is 9450480827.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7228060324 + 52780225 = 85018^2 + 7265^2 .

It is a cyclic number.

It is not a de Polignac number, because 7280840549 - 2⁸ = 7280840293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7280840579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640420274 + 3640420275.

It is an arithmetic number, because the mean of its divisors is an integer number (3640420275).

Almost surely, 2^7280840549 is an apocalyptic number.

It is an amenable number.

7280840549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7280840549 is an equidigital number, since it uses as much as digits as its factorization.

7280840549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 7280840549 is about 85327.8415817487. The cubic root of 7280840549 is about 1938.1788050048.

The spelling of 7280840549 in words is "seven billion, two hundred eighty million, eight hundred forty thousand, five hundred forty-nine".