127688831 has 2 divisors, whose sum is σ = 127688832. Its totient is φ = 127688830.

The previous prime is 127688809. The next prime is 127688833. The reversal of 127688831 is 138886721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127688831 - 2¹⁸ = 127426687 is a prime.

It is a super-2 number, since 2×127688831² = 32608875124293122, which contains 22 as substring.

Together with 127688833, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127688833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63844415 + 63844416.

It is an arithmetic number, because the mean of its divisors is an integer number (63844416).

Almost surely, 2^127688831 is an apocalyptic number.

127688831 is a deficient number, since it is larger than the sum of its proper divisors (1).

127688831 is an equidigital number, since it uses as much as digits as its factorization.

127688831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 44.

The square root of 127688831 is about 11299.9482742179. The cubic root of 127688831 is about 503.5597048602.

The spelling of 127688831 in words is "one hundred twenty-seven million, six hundred eighty-eight thousand, eight hundred thirty-one".