127120639 has 2 divisors, whose sum is σ = 127120640. Its totient is φ = 127120638.

The previous prime is 127120627. The next prime is 127120649. The reversal of 127120639 is 936021721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127120639 - 2¹⁷ = 126989567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127120639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127120649) 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, 63560319 + 63560320.

It is an arithmetic number, because the mean of its divisors is an integer number (63560320).

Almost surely, 2^127120639 is an apocalyptic number.

127120639 is a deficient number, since it is larger than the sum of its proper divisors (1).

127120639 is an equidigital number, since it uses as much as digits as its factorization.

127120639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 127120639 is about 11274.7788891845. The cubic root of 127120639 is about 502.8116779636.

The spelling of 127120639 in words is "one hundred twenty-seven million, one hundred twenty thousand, six hundred thirty-nine".