127142789 has 2 divisors, whose sum is σ = 127142790. Its totient is φ = 127142788.

The previous prime is 127142777. The next prime is 127142797. The reversal of 127142789 is 987241721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114597025 + 12545764 = 10705^2 + 3542^2 .

It is a cyclic number.

It is not a de Polignac number, because 127142789 - 2⁴ = 127142773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127141789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63571394 + 63571395.

It is an arithmetic number, because the mean of its divisors is an integer number (63571395).

Almost surely, 2^127142789 is an apocalyptic number.

It is an amenable number.

127142789 is a deficient number, since it is larger than the sum of its proper divisors (1).

127142789 is an equidigital number, since it uses as much as digits as its factorization.

127142789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 127142789 is about 11275.7611273031. The cubic root of 127142789 is about 502.8408802289.

The spelling of 127142789 in words is "one hundred twenty-seven million, one hundred forty-two thousand, seven hundred eighty-nine".