127981319 has 2 divisors, whose sum is σ = 127981320. Its totient is φ = 127981318.

The previous prime is 127981303. The next prime is 127981327. The reversal of 127981319 is 913189721.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (913189721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127981319 - 2⁴ = 127981303 is a prime.

It is a super-2 number, since 2×127981319² = 32758436025959522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127981339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63990659 + 63990660.

It is an arithmetic number, because the mean of its divisors is an integer number (63990660).

Almost surely, 2^127981319 is an apocalyptic number.

127981319 is a deficient number, since it is larger than the sum of its proper divisors (1).

127981319 is an equidigital number, since it uses as much as digits as its factorization.

127981319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 41.

The square root of 127981319 is about 11312.8828774986. The cubic root of 127981319 is about 503.9439014889.

The spelling of 127981319 in words is "one hundred twenty-seven million, nine hundred eighty-one thousand, three hundred nineteen".