127968019 has 2 divisors, whose sum is σ = 127968020. Its totient is φ = 127968018.

The previous prime is 127968013. The next prime is 127968037. The reversal of 127968019 is 910869721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127968019 - 2²¹ = 125870867 is a prime.

It is a super-2 number, since 2×127968019² = 32751627773568722, which contains 22 as substring.

It is equal to p_7269298 and since 127968019 and 7269298 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (127968013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63984009 + 63984010.

It is an arithmetic number, because the mean of its divisors is an integer number (63984010).

Almost surely, 2^127968019 is an apocalyptic number.

127968019 is a deficient number, since it is larger than the sum of its proper divisors (1).

127968019 is an equidigital number, since it uses as much as digits as its factorization.

127968019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 127968019 is about 11312.2950368172. The cubic root of 127968019 is about 503.9264440294.

The spelling of 127968019 in words is "one hundred twenty-seven million, nine hundred sixty-eight thousand, nineteen".