127677421 has 2 divisors, whose sum is σ = 127677422. Its totient is φ = 127677420.

The previous prime is 127677419. The next prime is 127677469. The reversal of 127677421 is 124776721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85932900 + 41744521 = 9270^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 127677421 - 2¹ = 127677419 is a prime.

It is a super-3 number, since 3×127677421³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 127677419, 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 (127077421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63838710 + 63838711.

It is an arithmetic number, because the mean of its divisors is an integer number (63838711).

Almost surely, 2^127677421 is an apocalyptic number.

It is an amenable number.

127677421 is a deficient number, since it is larger than the sum of its proper divisors (1).

127677421 is an equidigital number, since it uses as much as digits as its factorization.

127677421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 37.

The square root of 127677421 is about 11299.4433933712. The cubic root of 127677421 is about 503.5447054085.

The spelling of 127677421 in words is "one hundred twenty-seven million, six hundred seventy-seven thousand, four hundred twenty-one".