127701913309 has 2 divisors, whose sum is σ = 127701913310. Its totient is φ = 127701913308.

The previous prime is 127701913259. The next prime is 127701913321. The reversal of 127701913309 is 903319107721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114031159225 + 13670754084 = 337685^2 + 116922^2 .

It is a cyclic number.

It is not a de Polignac number, because 127701913309 - 2²¹ = 127699816157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127701913909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63850956654 + 63850956655.

It is an arithmetic number, because the mean of its divisors is an integer number (63850956655).

Almost surely, 2^127701913309 is an apocalyptic number.

It is an amenable number.

127701913309 is a deficient number, since it is larger than the sum of its proper divisors (1).

127701913309 is an equidigital number, since it uses as much as digits as its factorization.

127701913309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 43.

The spelling of 127701913309 in words is "one hundred twenty-seven billion, seven hundred one million, nine hundred thirteen thousand, three hundred nine".