75499427 has 2 divisors, whose sum is σ = 75499428.
Its totient is φ = 75499426.
The previous prime is 75499393. The next prime is 75499429. The reversal of 75499427 is 72499457.
It is a strong prime.
It is an emirp because it is prime and its reverse (72499457) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-75499427 is a prime.
Together with 75499429, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (75499429) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37749713 + 37749714.
It is an arithmetic number, because the mean of its divisors is an integer number (37749714).
Almost surely, 275499427 is an apocalyptic number.
75499427 is a deficient number, since it is larger than the sum of its proper divisors (1).
75499427 is an equidigital number, since it uses as much as digits as its factorization.
75499427 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 635040, while the sum is 47.
The square root of 75499427 is about 8689.0406259840.
The cubic root of 75499427 is about 422.6503359592.
The spelling of 75499427 in words is "seventy-five million, four hundred ninety-nine thousand, four hundred twenty-seven".