75000845 has 4 divisors (see below), whose sum is σ = 90001020. Its totient is φ = 60000672.

The previous prime is 75000841. The next prime is 75000853. The reversal of 75000845 is 54800057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54800057 = 13 ⋅4215389.

It can be written as a sum of positive squares in 2 ways, for example, as 7941124 + 67059721 = 2818^2 + 8189^2 .

It is a cyclic number.

It is not a de Polignac number, because 75000845 - 2² = 75000841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75000841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7500080 + ... + 7500089.

It is an arithmetic number, because the mean of its divisors is an integer number (22500255).

Almost surely, 2^75000845 is an apocalyptic number.

It is an amenable number.

75000845 is a deficient number, since it is larger than the sum of its proper divisors (15000175).

75000845 is a wasteful number, since it uses less digits than its factorization.

75000845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000174.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 75000845 is about 8660.3028238047. The cubic root of 75000845 is about 421.7179164240.

The spelling of 75000845 in words is "seventy-five million, eight hundred forty-five", and thus it is an aban number.