75638623 has 2 divisors, whose sum is σ = 75638624. Its totient is φ = 75638622.

The previous prime is 75638611. The next prime is 75638653. The reversal of 75638623 is 32683657.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75638623 is a prime.

It is a super-2 number, since 2×75638623² = 11442402578672258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75638653) 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, 37819311 + 37819312.

It is an arithmetic number, because the mean of its divisors is an integer number (37819312).

Almost surely, 2^75638623 is an apocalyptic number.

75638623 is a deficient number, since it is larger than the sum of its proper divisors (1).

75638623 is an equidigital number, since it uses as much as digits as its factorization.

75638623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 75638623 is about 8697.0467976204. The cubic root of 75638623 is about 422.9099190244.

The spelling of 75638623 in words is "seventy-five million, six hundred thirty-eight thousand, six hundred twenty-three".