8541121747 has 2 divisors, whose sum is σ = 8541121748. Its totient is φ = 8541121746.

The previous prime is 8541121733. The next prime is 8541121753. The reversal of 8541121747 is 7471211458.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8541121747 - 2³¹ = 6393638099 is a prime.

It is not a weakly prime, because it can be changed into another prime (8541121247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4270560873 + 4270560874.

It is an arithmetic number, because the mean of its divisors is an integer number (4270560874).

Almost surely, 2^8541121747 is an apocalyptic number.

8541121747 is a deficient number, since it is larger than the sum of its proper divisors (1).

8541121747 is an equidigital number, since it uses as much as digits as its factorization.

8541121747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 40.

The square root of 8541121747 is about 92418.1894812920. The cubic root of 8541121747 is about 2044.1133322162.

The spelling of 8541121747 in words is "eight billion, five hundred forty-one million, one hundred twenty-one thousand, seven hundred forty-seven".