71323745 has 4 divisors (see below), whose sum is σ = 85588500. Its totient is φ = 57058992.

The previous prime is 71323741. The next prime is 71323751. The reversal of 71323745 is 54732317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38651089 + 32672656 = 6217^2 + 5716^2 .

It is a cyclic number.

It is not a de Polignac number, because 71323745 - 2² = 71323741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71323741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7132370 + ... + 7132379.

It is an arithmetic number, because the mean of its divisors is an integer number (21397125).

Almost surely, 2^71323745 is an apocalyptic number.

It is an amenable number.

71323745 is a deficient number, since it is larger than the sum of its proper divisors (14264755).

71323745 is a wasteful number, since it uses less digits than its factorization.

71323745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14264754.

The product of its digits is 17640, while the sum is 32.

The square root of 71323745 is about 8445.3386551399. The cubic root of 71323745 is about 414.7101958896.

The spelling of 71323745 in words is "seventy-one million, three hundred twenty-three thousand, seven hundred forty-five".