127905797 has 2 divisors, whose sum is σ = 127905798. Its totient is φ = 127905796.

The previous prime is 127905793. The next prime is 127905809. The reversal of 127905797 is 797509721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116079076 + 11826721 = 10774^2 + 3439^2 .

It is an emirp because it is prime and its reverse (797509721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127905797 - 2² = 127905793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127905793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63952898 + 63952899.

It is an arithmetic number, because the mean of its divisors is an integer number (63952899).

Almost surely, 2^127905797 is an apocalyptic number.

It is an amenable number.

127905797 is a deficient number, since it is larger than the sum of its proper divisors (1).

127905797 is an equidigital number, since it uses as much as digits as its factorization.

127905797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277830, while the sum is 47.

The square root of 127905797 is about 11309.5445089535. The cubic root of 127905797 is about 503.8447559254.

The spelling of 127905797 in words is "one hundred twenty-seven million, nine hundred five thousand, seven hundred ninety-seven".