127651663 has 2 divisors, whose sum is σ = 127651664. Its totient is φ = 127651662.

The previous prime is 127651661. The next prime is 127651673. The reversal of 127651663 is 366156721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127651663 - 2¹ = 127651661 is a prime.

Together with 127651661, 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 (127651661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63825831 + 63825832.

It is an arithmetic number, because the mean of its divisors is an integer number (63825832).

Almost surely, 2^127651663 is an apocalyptic number.

127651663 is a deficient number, since it is larger than the sum of its proper divisors (1).

127651663 is an equidigital number, since it uses as much as digits as its factorization.

127651663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 127651663 is about 11298.3035452231. The cubic root of 127651663 is about 503.5108409587.

The spelling of 127651663 in words is "one hundred twenty-seven million, six hundred fifty-one thousand, six hundred sixty-three".