7127987947 has 2 divisors, whose sum is σ = 7127987948. Its totient is φ = 7127987946.

The previous prime is 7127987887. The next prime is 7127987989. The reversal of 7127987947 is 7497897217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7127987947 - 2¹⁹ = 7127463659 is a prime.

It is not a weakly prime, because it can be changed into another prime (7127982947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3563993973 + 3563993974.

It is an arithmetic number, because the mean of its divisors is an integer number (3563993974).

Almost surely, 2^7127987947 is an apocalyptic number.

7127987947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7127987947 is an equidigital number, since it uses as much as digits as its factorization.

7127987947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12446784, while the sum is 61.

The square root of 7127987947 is about 84427.4122960073. The cubic root of 7127987947 is about 1924.5195132491.

The spelling of 7127987947 in words is "seven billion, one hundred twenty-seven million, nine hundred eighty-seven thousand, nine hundred forty-seven".