127734661 has 2 divisors, whose sum is σ = 127734662. Its totient is φ = 127734660.

The previous prime is 127734641. The next prime is 127734667. The reversal of 127734661 is 166437721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110145025 + 17589636 = 10495^2 + 4194^2 .

It is an emirp because it is prime and its reverse (166437721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127734661 - 2⁷ = 127734533 is a prime.

It is a super-2 number, since 2×127734661² = 32632287241569842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127734661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127734667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63867330 + 63867331.

It is an arithmetic number, because the mean of its divisors is an integer number (63867331).

Almost surely, 2^127734661 is an apocalyptic number.

It is an amenable number.

127734661 is a deficient number, since it is larger than the sum of its proper divisors (1).

127734661 is an equidigital number, since it uses as much as digits as its factorization.

127734661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 127734661 is about 11301.9759776775. The cubic root of 127734661 is about 503.6199434381.

The spelling of 127734661 in words is "one hundred twenty-seven million, seven hundred thirty-four thousand, six hundred sixty-one".