7442890549 has 2 divisors, whose sum is σ = 7442890550. Its totient is φ = 7442890548.

The previous prime is 7442890529. The next prime is 7442890561. The reversal of 7442890549 is 9450982447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7349632900 + 93257649 = 85730^2 + 9657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7442890549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7442890496 and 7442890505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7442890529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3721445274 + 3721445275.

It is an arithmetic number, because the mean of its divisors is an integer number (3721445275).

Almost surely, 2^7442890549 is an apocalyptic number.

It is an amenable number.

7442890549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7442890549 is an equidigital number, since it uses as much as digits as its factorization.

7442890549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The square root of 7442890549 is about 86272.1887342613. The cubic root of 7442890549 is about 1952.4528020383.

The spelling of 7442890549 in words is "seven billion, four hundred forty-two million, eight hundred ninety thousand, five hundred forty-nine".