71389345 has 8 divisors (see below), whose sum is σ = 85714920. Its totient is φ = 57079680.

The previous prime is 71389343. The next prime is 71389361. The reversal of 71389345 is 54398317.

It can be written as a sum of positive squares in 4 ways, for example, as 18870336 + 52519009 = 4344^2 + 7247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71389345 - 2¹ = 71389343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71389298 and 71389307.

It is not an unprimeable number, because it can be changed into a prime (71389343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11101 + ... + 16309.

It is an arithmetic number, because the mean of its divisors is an integer number (10714365).

Almost surely, 2^71389345 is an apocalyptic number.

It is an amenable number.

71389345 is a deficient number, since it is larger than the sum of its proper divisors (14325575).

71389345 is a wasteful number, since it uses less digits than its factorization.

71389345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955.

The product of its digits is 90720, while the sum is 40.

The square root of 71389345 is about 8449.2215617772. The cubic root of 71389345 is about 414.8373001357.

The spelling of 71389345 in words is "seventy-one million, three hundred eighty-nine thousand, three hundred forty-five".