75045643 has 2 divisors, whose sum is σ = 75045644. Its totient is φ = 75045642.

The previous prime is 75045631. The next prime is 75045653. The reversal of 75045643 is 34654057.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75045643 - 2²⁵ = 41491211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75045599 and 75045608.

It is not a weakly prime, because it can be changed into another prime (75045613) 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 as a sum of consecutive naturals, namely, 37522821 + 37522822.

It is an arithmetic number, because the mean of its divisors is an integer number (37522822).

Almost surely, 2^75045643 is an apocalyptic number.

75045643 is a deficient number, since it is larger than the sum of its proper divisors (1).

75045643 is an equidigital number, since it uses as much as digits as its factorization.

75045643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 75045643 is about 8662.8888368719. Note that the first 4 decimals coincide. The cubic root of 75045643 is about 421.8018637407.

The spelling of 75045643 in words is "seventy-five million, forty-five thousand, six hundred forty-three".