6135721147 has 2 divisors, whose sum is σ = 6135721148. Its totient is φ = 6135721146.

The previous prime is 6135721099. The next prime is 6135721169. The reversal of 6135721147 is 7411275316.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6135721147 is a prime.

It is not a weakly prime, because it can be changed into another prime (6135761147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3067860573 + 3067860574.

It is an arithmetic number, because the mean of its divisors is an integer number (3067860574).

Almost surely, 2^6135721147 is an apocalyptic number.

6135721147 is a deficient number, since it is larger than the sum of its proper divisors (1).

6135721147 is an equidigital number, since it uses as much as digits as its factorization.

6135721147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 6135721147 is about 78330.8441611604. The cubic root of 6135721147 is about 1830.7197689229.

The spelling of 6135721147 in words is "six billion, one hundred thirty-five million, seven hundred twenty-one thousand, one hundred forty-seven".