127285813 has 2 divisors, whose sum is σ = 127285814. Its totient is φ = 127285812.

The previous prime is 127285811. The next prime is 127285849. The reversal of 127285813 is 318582721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114768369 + 12517444 = 10713^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 127285813 - 2¹ = 127285811 is a prime.

Together with 127285811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127285811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63642906 + 63642907.

It is an arithmetic number, because the mean of its divisors is an integer number (63642907).

Almost surely, 2^127285813 is an apocalyptic number.

It is an amenable number.

127285813 is a deficient number, since it is larger than the sum of its proper divisors (1).

127285813 is an equidigital number, since it uses as much as digits as its factorization.

127285813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 127285813 is about 11282.1014443232. The cubic root of 127285813 is about 503.0293595606.

The spelling of 127285813 in words is "one hundred twenty-seven million, two hundred eighty-five thousand, eight hundred thirteen".