127057691 has 2 divisors, whose sum is σ = 127057692. Its totient is φ = 127057690.

The previous prime is 127057663. The next prime is 127057699. The reversal of 127057691 is 196750721.

It is a strong prime.

It is an emirp because it is prime and its reverse (196750721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127057691 - 2⁶ = 127057627 is a prime.

It is a super-2 number, since 2×127057691² = 32287313684502962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (127057699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63528845 + 63528846.

It is an arithmetic number, because the mean of its divisors is an integer number (63528846).

Almost surely, 2^127057691 is an apocalyptic number.

127057691 is a deficient number, since it is larger than the sum of its proper divisors (1).

127057691 is an equidigital number, since it uses as much as digits as its factorization.

127057691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 127057691 is about 11271.9870031863. The cubic root of 127057691 is about 502.7286696351.

The spelling of 127057691 in words is "one hundred twenty-seven million, fifty-seven thousand, six hundred ninety-one".