127877993 has 2 divisors, whose sum is σ = 127877994. Its totient is φ = 127877992.

The previous prime is 127877989. The next prime is 127878013. The reversal of 127877993 is 399778721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126270169 + 1607824 = 11237^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 127877993 - 2² = 127877989 is a prime.

It is not a weakly prime, because it can be changed into another prime (127877963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63938996 + 63938997.

It is an arithmetic number, because the mean of its divisors is an integer number (63938997).

Almost surely, 2^127877993 is an apocalyptic number.

It is an amenable number.

127877993 is a deficient number, since it is larger than the sum of its proper divisors (1).

127877993 is an equidigital number, since it uses as much as digits as its factorization.

127877993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 53.

The square root of 127877993 is about 11308.3152149204. The cubic root of 127877993 is about 503.8082449016.

It can be divided in two parts, 127 and 877993, that multiplied together give a palindrome (111505111).

The spelling of 127877993 in words is "one hundred twenty-seven million, eight hundred seventy-seven thousand, nine hundred ninety-three".