75843945 has 24 divisors (see below), whose sum is σ = 136334016. Its totient is φ = 40449456.

The previous prime is 75843941. The next prime is 75843967. The reversal of 75843945 is 54934857.

It is not a de Polignac number, because 75843945 - 2² = 75843941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 75843945.

It is not an unprimeable number, because it can be changed into a prime (75843941) 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 23 ways as a sum of consecutive naturals, for example, 29997 + ... + 32426.

It is an arithmetic number, because the mean of its divisors is an integer number (5680584).

Almost surely, 2^75843945 is an apocalyptic number.

It is an amenable number.

75843945 is a deficient number, since it is larger than the sum of its proper divisors (60490071).

75843945 is an equidigital number, since it uses as much as digits as its factorization.

75843945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62443 (or 62431 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 75843945 is about 8708.8429196995. The cubic root of 75843945 is about 423.2922380731.

The spelling of 75843945 in words is "seventy-five million, eight hundred forty-three thousand, nine hundred forty-five".