75538691 has 2 divisors, whose sum is σ = 75538692. Its totient is φ = 75538690.

The previous prime is 75538637. The next prime is 75538751. The reversal of 75538691 is 19683557.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75538691 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (75508691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37769345 + 37769346.

It is an arithmetic number, because the mean of its divisors is an integer number (37769346).

Almost surely, 2^75538691 is an apocalyptic number.

75538691 is a deficient number, since it is larger than the sum of its proper divisors (1).

75538691 is an equidigital number, since it uses as much as digits as its factorization.

75538691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 75538691 is about 8691.2997301900. The cubic root of 75538691 is about 422.7235906735.

The spelling of 75538691 in words is "seventy-five million, five hundred thirty-eight thousand, six hundred ninety-one".