75638447 has 2 divisors, whose sum is σ = 75638448. Its totient is φ = 75638446.

The previous prime is 75638429. The next prime is 75638461. The reversal of 75638447 is 74483657.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75638447 - 2¹⁸ = 75376303 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75638398 and 75638407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75638417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37819223 + 37819224.

It is an arithmetic number, because the mean of its divisors is an integer number (37819224).

Almost surely, 2^75638447 is an apocalyptic number.

75638447 is a deficient number, since it is larger than the sum of its proper divisors (1).

75638447 is an equidigital number, since it uses as much as digits as its factorization.

75638447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 75638447 is about 8697.0366792374. The cubic root of 75638447 is about 422.9095910076.

The spelling of 75638447 in words is "seventy-five million, six hundred thirty-eight thousand, four hundred forty-seven".