75243943 has 4 divisors (see below), whose sum is σ = 75392280. Its totient is φ = 75095608.

The previous prime is 75243929. The next prime is 75244031. The reversal of 75243943 is 34934257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34934257 = 613 ⋅56989.

It is a cyclic number.

It is not a de Polignac number, because 75243943 - 2⁹ = 75243431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75243923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73405 + ... + 74422.

It is an arithmetic number, because the mean of its divisors is an integer number (18848070).

Almost surely, 2^75243943 is an apocalyptic number.

75243943 is a deficient number, since it is larger than the sum of its proper divisors (148337).

75243943 is a wasteful number, since it uses less digits than its factorization.

75243943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148336.

The product of its digits is 90720, while the sum is 37.

The square root of 75243943 is about 8674.3266597471. The cubic root of 75243943 is about 422.1730589289.

The spelling of 75243943 in words is "seventy-five million, two hundred forty-three thousand, nine hundred forty-three".