71473813 has 2 divisors, whose sum is σ = 71473814. Its totient is φ = 71473812.

The previous prime is 71473799. The next prime is 71473837. The reversal of 71473813 is 31837417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 16016004 = 7447^2 + 4002^2 .

It is a cyclic number.

It is not a de Polignac number, because 71473813 - 2⁵ = 71473781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71473513) 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, 35736906 + 35736907.

It is an arithmetic number, because the mean of its divisors is an integer number (35736907).

Almost surely, 2^71473813 is an apocalyptic number.

It is an amenable number.

71473813 is a deficient number, since it is larger than the sum of its proper divisors (1).

71473813 is an equidigital number, since it uses as much as digits as its factorization.

71473813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 71473813 is about 8454.2186510641. The cubic root of 71473813 is about 415.0008477265. Note that the first 3 decimals are identical.

The spelling of 71473813 in words is "seventy-one million, four hundred seventy-three thousand, eight hundred thirteen".