127867661 has 2 divisors, whose sum is σ = 127867662. Its totient is φ = 127867660.

The previous prime is 127867639. The next prime is 127867669. The reversal of 127867661 is 166768721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127825636 + 42025 = 11306^2 + 205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127867661 is a prime.

It is a super-2 number, since 2×127867661² = 32700277459221842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127867669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63933830 + 63933831.

It is an arithmetic number, because the mean of its divisors is an integer number (63933831).

Almost surely, 2^127867661 is an apocalyptic number.

It is an amenable number.

127867661 is a deficient number, since it is larger than the sum of its proper divisors (1).

127867661 is an equidigital number, since it uses as much as digits as its factorization.

127867661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 127867661 is about 11307.8583737152. The cubic root of 127867661 is about 503.7946760123.

The spelling of 127867661 in words is "one hundred twenty-seven million, eight hundred sixty-seven thousand, six hundred sixty-one".