71573007949 has 2 divisors, whose sum is σ = 71573007950. Its totient is φ = 71573007948.

The previous prime is 71573007937. The next prime is 71573007959. The reversal of 71573007949 is 94970037517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56906102500 + 14666905449 = 238550^2 + 121107^2 .

It is a cyclic number.

It is not a de Polignac number, because 71573007949 - 2⁹ = 71573007437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71573007896 and 71573007905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71573007959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35786503974 + 35786503975.

It is an arithmetic number, because the mean of its divisors is an integer number (35786503975).

Almost surely, 2^71573007949 is an apocalyptic number.

It is an amenable number.

71573007949 is a deficient number, since it is larger than the sum of its proper divisors (1).

71573007949 is an equidigital number, since it uses as much as digits as its factorization.

71573007949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1666980, while the sum is 52.

The spelling of 71573007949 in words is "seventy-one billion, five hundred seventy-three million, seven thousand, nine hundred forty-nine".