127527501389 has 2 divisors, whose sum is σ = 127527501390. Its totient is φ = 127527501388.

The previous prime is 127527501341. The next prime is 127527501391. The reversal of 127527501389 is 983105725721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101087115364 + 26440386025 = 317942^2 + 162605^2 .

It is a cyclic number.

It is not a de Polignac number, because 127527501389 - 2⁸ = 127527501133 is a prime.

It is a super-2 number, since 2×127527501389² (a number of 23 digits) contains 22 as substring.

Together with 127527501391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127527501889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63763750694 + 63763750695.

It is an arithmetic number, because the mean of its divisors is an integer number (63763750695).

Almost surely, 2^127527501389 is an apocalyptic number.

It is an amenable number.

127527501389 is a deficient number, since it is larger than the sum of its proper divisors (1).

127527501389 is an equidigital number, since it uses as much as digits as its factorization.

127527501389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 127527501389 in words is "one hundred twenty-seven billion, five hundred twenty-seven million, five hundred one thousand, three hundred eighty-nine".