71824913 has 2 divisors, whose sum is σ = 71824914. Its totient is φ = 71824912.

The previous prime is 71824903. The next prime is 71824937. The reversal of 71824913 is 31942817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40094224 + 31730689 = 6332^2 + 5633^2 .

It is a cyclic number.

It is not a de Polignac number, because 71824913 - 2⁴ = 71824897 is a prime.

It is not a weakly prime, because it can be changed into another prime (71824903) 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, 35912456 + 35912457.

It is an arithmetic number, because the mean of its divisors is an integer number (35912457).

Almost surely, 2^71824913 is an apocalyptic number.

It is an amenable number.

71824913 is a deficient number, since it is larger than the sum of its proper divisors (1).

71824913 is an equidigital number, since it uses as much as digits as its factorization.

71824913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 71824913 is about 8474.9579939962. The cubic root of 71824913 is about 415.6792727137.

The spelling of 71824913 in words is "seventy-one million, eight hundred twenty-four thousand, nine hundred thirteen".