71748745 has 4 divisors (see below), whose sum is σ = 86098500. Its totient is φ = 57398992.

The previous prime is 71748739. The next prime is 71748757. The reversal of 71748745 is 54784717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54784717 = 13 ⋅4214209.

It can be written as a sum of positive squares in 2 ways, for example, as 54007801 + 17740944 = 7349^2 + 4212^2 .

It is a cyclic number.

It is not a de Polignac number, because 71748745 - 2³ = 71748737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7174870 + ... + 7174879.

It is an arithmetic number, because the mean of its divisors is an integer number (21524625).

Almost surely, 2^71748745 is an apocalyptic number.

It is an amenable number.

71748745 is a deficient number, since it is larger than the sum of its proper divisors (14349755).

71748745 is a wasteful number, since it uses less digits than its factorization.

71748745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14349754.

The product of its digits is 219520, while the sum is 43.

The square root of 71748745 is about 8470.4630924171. The cubic root of 71748745 is about 415.5322825952.

The spelling of 71748745 in words is "seventy-one million, seven hundred forty-eight thousand, seven hundred forty-five".