75047745 has 32 divisors (see below), whose sum is σ = 124637184. Its totient is φ = 38520000.

The previous prime is 75047743. The next prime is 75047761. The reversal of 75047745 is 54774057.

It is not a de Polignac number, because 75047745 - 2¹ = 75047743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75047743) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 116394 + ... + 117036.

It is an arithmetic number, because the mean of its divisors is an integer number (3894912).

Almost surely, 2^75047745 is an apocalyptic number.

It is an amenable number.

75047745 is a deficient number, since it is larger than the sum of its proper divisors (49589439).

75047745 is a wasteful number, since it uses less digits than its factorization.

75047745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933.

The product of its (nonzero) digits is 137200, while the sum is 39.

The square root of 75047745 is about 8663.0101581379. The cubic root of 75047745 is about 421.8058018740.

The spelling of 75047745 in words is "seventy-five million, forty-seven thousand, seven hundred forty-five".