7042378549 has 2 divisors, whose sum is σ = 7042378550. Its totient is φ = 7042378548.

The previous prime is 7042378523. The next prime is 7042378559. The reversal of 7042378549 is 9458732407.

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., 3622234225 + 3420144324 = 60185^2 + 58482^2 .

It is a cyclic number.

It is not a de Polignac number, because 7042378549 - 2⁹ = 7042378037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7042378559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521189274 + 3521189275.

It is an arithmetic number, because the mean of its divisors is an integer number (3521189275).

Almost surely, 2^7042378549 is an apocalyptic number.

It is an amenable number.

7042378549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042378549 is an equidigital number, since it uses as much as digits as its factorization.

7042378549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The square root of 7042378549 is about 83918.8807658920. The cubic root of 7042378549 is about 1916.7837637277.

The spelling of 7042378549 in words is "seven billion, forty-two million, three hundred seventy-eight thousand, five hundred forty-nine".