71319473 has 2 divisors, whose sum is σ = 71319474. Its totient is φ = 71319472.

The previous prime is 71319421. The next prime is 71319487. The reversal of 71319473 is 37491317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37540129 + 33779344 = 6127^2 + 5812^2 .

It is an emirp because it is prime and its reverse (37491317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71319473 is a prime.

It is not a weakly prime, because it can be changed into another prime (71319373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35659736 + 35659737.

It is an arithmetic number, because the mean of its divisors is an integer number (35659737).

Almost surely, 2^71319473 is an apocalyptic number.

It is an amenable number.

71319473 is a deficient number, since it is larger than the sum of its proper divisors (1).

71319473 is an equidigital number, since it uses as much as digits as its factorization.

71319473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 71319473 is about 8445.0857307667. The cubic root of 71319473 is about 414.7019159106.

The spelling of 71319473 in words is "seventy-one million, three hundred nineteen thousand, four hundred seventy-three".