71385739 has 2 divisors, whose sum is σ = 71385740. Its totient is φ = 71385738.

The previous prime is 71385707. The next prime is 71385763. The reversal of 71385739 is 93758317.

It is a strong prime.

It is an emirp because it is prime and its reverse (93758317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71385739 - 2⁵ = 71385707 is a prime.

It is a super-2 number, since 2×71385739² = 10191847465152242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71385695 and 71385704.

It is not a weakly prime, because it can be changed into another prime (71385239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35692869 + 35692870.

It is an arithmetic number, because the mean of its divisors is an integer number (35692870).

Almost surely, 2^71385739 is an apocalyptic number.

71385739 is a deficient number, since it is larger than the sum of its proper divisors (1).

71385739 is an equidigital number, since it uses as much as digits as its factorization.

71385739 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 71385739 is about 8449.0081666430. The cubic root of 71385739 is about 414.8303153002.

The spelling of 71385739 in words is "seventy-one million, three hundred eighty-five thousand, seven hundred thirty-nine".