71522947 has 2 divisors, whose sum is σ = 71522948. Its totient is φ = 71522946.

The previous prime is 71522929. The next prime is 71522951. The reversal of 71522947 is 74922517.

It is a strong prime.

It is an emirp because it is prime and its reverse (74922517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71522947 - 2¹¹ = 71520899 is a prime.

It is not a weakly prime, because it can be changed into another prime (71522977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35761473 + 35761474.

It is an arithmetic number, because the mean of its divisors is an integer number (35761474).

Almost surely, 2^71522947 is an apocalyptic number.

71522947 is a deficient number, since it is larger than the sum of its proper divisors (1).

71522947 is an equidigital number, since it uses as much as digits as its factorization.

71522947 is an odious number, because the sum of its binary digits is odd.

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

The square root of 71522947 is about 8457.1240383478. The cubic root of 71522947 is about 415.0959220861.

The spelling of 71522947 in words is "seventy-one million, five hundred twenty-two thousand, nine hundred forty-seven".