127891039 has 2 divisors, whose sum is σ = 127891040. Its totient is φ = 127891038.

The previous prime is 127891037. The next prime is 127891069. The reversal of 127891039 is 930198721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127891039 - 2¹ = 127891037 is a prime.

It is a super-2 number, since 2×127891039² = 32712235712999042, which contains 22 as substring.

Together with 127891037, 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 = 127890992 and 127891010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127891037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63945519 + 63945520.

It is an arithmetic number, because the mean of its divisors is an integer number (63945520).

Almost surely, 2^127891039 is an apocalyptic number.

127891039 is a deficient number, since it is larger than the sum of its proper divisors (1).

127891039 is an equidigital number, since it uses as much as digits as its factorization.

127891039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 127891039 is about 11308.8920323788. The cubic root of 127891039 is about 503.8253770099.

The spelling of 127891039 in words is "one hundred twenty-seven million, eight hundred ninety-one thousand, thirty-nine".