7147172947 has 2 divisors, whose sum is σ = 7147172948. Its totient is φ = 7147172946.

The previous prime is 7147172933. The next prime is 7147172953. The reversal of 7147172947 is 7492717417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7147172947 - 2⁷ = 7147172819 is a prime.

It is a super-2 number, since 2×7147172947² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7147172947.

It is not a weakly prime, because it can be changed into another prime (7147172917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3573586473 + 3573586474.

It is an arithmetic number, because the mean of its divisors is an integer number (3573586474).

Almost surely, 2^7147172947 is an apocalyptic number.

7147172947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7147172947 is an equidigital number, since it uses as much as digits as its factorization.

7147172947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 49.

The square root of 7147172947 is about 84540.9542588679. The cubic root of 7147172947 is about 1926.2445830930.

The spelling of 7147172947 in words is "seven billion, one hundred forty-seven million, one hundred seventy-two thousand, nine hundred forty-seven".