127640371 has 2 divisors, whose sum is σ = 127640372. Its totient is φ = 127640370.

The previous prime is 127640333. The next prime is 127640399. The reversal of 127640371 is 173046721.

It is a strong prime.

It is an emirp because it is prime and its reverse (173046721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127640371 - 2¹⁹ = 127116083 is a prime.

It is not a weakly prime, because it can be changed into another prime (127640971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63820185 + 63820186.

It is an arithmetic number, because the mean of its divisors is an integer number (63820186).

Almost surely, 2^127640371 is an apocalyptic number.

127640371 is a deficient number, since it is larger than the sum of its proper divisors (1).

127640371 is an equidigital number, since it uses as much as digits as its factorization.

127640371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 127640371 is about 11297.8038131311. The cubic root of 127640371 is about 503.4959937515.

The spelling of 127640371 in words is "one hundred twenty-seven million, six hundred forty thousand, three hundred seventy-one".