127578497 has 2 divisors, whose sum is σ = 127578498. Its totient is φ = 127578496.

The previous prime is 127578461. The next prime is 127578499. The reversal of 127578497 is 794875721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126315121 + 1263376 = 11239^2 + 1124^2 .

It is an emirp because it is prime and its reverse (794875721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127578497 - 2⁶ = 127578433 is a prime.

Together with 127578499, 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 (127578499) 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, 63789248 + 63789249.

It is an arithmetic number, because the mean of its divisors is an integer number (63789249).

Almost surely, 2^127578497 is an apocalyptic number.

It is an amenable number.

127578497 is a deficient number, since it is larger than the sum of its proper divisors (1).

127578497 is an equidigital number, since it uses as much as digits as its factorization.

127578497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 50.

The square root of 127578497 is about 11295.0651613880. The cubic root of 127578497 is about 503.4146236068.

The spelling of 127578497 in words is "one hundred twenty-seven million, five hundred seventy-eight thousand, four hundred ninety-seven".