127956551 has 2 divisors, whose sum is σ = 127956552. Its totient is φ = 127956550.

The previous prime is 127956547. The next prime is 127956553. The reversal of 127956551 is 155659721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127956551 - 2² = 127956547 is a prime.

Together with 127956553, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 127956499 and 127956508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127956553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63978275 + 63978276.

It is an arithmetic number, because the mean of its divisors is an integer number (63978276).

Almost surely, 2^127956551 is an apocalyptic number.

127956551 is a deficient number, since it is larger than the sum of its proper divisors (1).

127956551 is an equidigital number, since it uses as much as digits as its factorization.

127956551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 41.

The square root of 127956551 is about 11311.7881433485. The cubic root of 127956551 is about 503.9113902654.

The spelling of 127956551 in words is "one hundred twenty-seven million, nine hundred fifty-six thousand, five hundred fifty-one".