127475977 has 2 divisors, whose sum is σ = 127475978. Its totient is φ = 127475976.

The previous prime is 127475963. The next prime is 127475981. The reversal of 127475977 is 779574721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126810121 + 665856 = 11261^2 + 816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127475977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127475977.

It is not a weakly prime, because it can be changed into another prime (127475987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63737988 + 63737989.

It is an arithmetic number, because the mean of its divisors is an integer number (63737989).

Almost surely, 2^127475977 is an apocalyptic number.

It is an amenable number.

127475977 is a deficient number, since it is larger than the sum of its proper divisors (1).

127475977 is an equidigital number, since it uses as much as digits as its factorization.

127475977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864360, while the sum is 49.

The square root of 127475977 is about 11290.5259842046. The cubic root of 127475977 is about 503.2797422098.

The spelling of 127475977 in words is "one hundred twenty-seven million, four hundred seventy-five thousand, nine hundred seventy-seven".