75889945 has 4 divisors (see below), whose sum is σ = 91067940. Its totient is φ = 60711952.

The previous prime is 75889943. The next prime is 75889963. The reversal of 75889945 is 54998857.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54998857 = 73 ⋅753409.

It can be written as a sum of positive squares in 2 ways, for example, as 25593481 + 50296464 = 5059^2 + 7092^2 .

It is a cyclic number.

It is not a de Polignac number, because 75889945 - 2¹ = 75889943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75889943) 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, 7588990 + ... + 7588999.

It is an arithmetic number, because the mean of its divisors is an integer number (22766985).

Almost surely, 2^75889945 is an apocalyptic number.

It is an amenable number.

75889945 is a deficient number, since it is larger than the sum of its proper divisors (15177995).

75889945 is a wasteful number, since it uses less digits than its factorization.

75889945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15177994.

The product of its digits is 3628800, while the sum is 55.

The square root of 75889945 is about 8711.4835131566. The cubic root of 75889945 is about 423.3777975630.

The spelling of 75889945 in words is "seventy-five million, eight hundred eighty-nine thousand, nine hundred forty-five".