71389573 has 2 divisors, whose sum is σ = 71389574. Its totient is φ = 71389572.

The previous prime is 71389553. The next prime is 71389583. The reversal of 71389573 is 37598317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47983329 + 23406244 = 6927^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 71389573 - 2⁵ = 71389541 is a prime.

It is a super-2 number, since 2×71389573² = 10192942266244658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71389543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35694786 + 35694787.

It is an arithmetic number, because the mean of its divisors is an integer number (35694787).

Almost surely, 2^71389573 is an apocalyptic number.

It is an amenable number.

71389573 is a deficient number, since it is larger than the sum of its proper divisors (1).

71389573 is an equidigital number, since it uses as much as digits as its factorization.

71389573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 71389573 is about 8449.2350541336. The cubic root of 71389573 is about 414.8377417646.

The spelling of 71389573 in words is "seventy-one million, three hundred eighty-nine thousand, five hundred seventy-three".