127912931 has 2 divisors, whose sum is σ = 127912932. Its totient is φ = 127912930.

The previous prime is 127912909. The next prime is 127912937. The reversal of 127912931 is 139219721.

It is a strong prime.

It is an emirp because it is prime and its reverse (139219721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127912931 - 2²⁶ = 60804067 is a prime.

It is a super-2 number, since 2×127912931² = 32723435834021522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 127912891 and 127912900.

It is not a weakly prime, because it can be changed into another prime (127912937) 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, 63956465 + 63956466.

It is an arithmetic number, because the mean of its divisors is an integer number (63956466).

Almost surely, 2^127912931 is an apocalyptic number.

127912931 is a deficient number, since it is larger than the sum of its proper divisors (1).

127912931 is an equidigital number, since it uses as much as digits as its factorization.

127912931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 127912931 is about 11309.8599018732. The cubic root of 127912931 is about 503.8541231361.

The spelling of 127912931 in words is "one hundred twenty-seven million, nine hundred twelve thousand, nine hundred thirty-one".