127316231509 has 2 divisors, whose sum is σ = 127316231510. Its totient is φ = 127316231508.

The previous prime is 127316231461. The next prime is 127316231519. The reversal of 127316231509 is 905132613721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122930878225 + 4385353284 = 350615^2 + 66222^2 .

It is a cyclic number.

It is not a de Polignac number, because 127316231509 - 2¹³ = 127316223317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127316231519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63658115754 + 63658115755.

It is an arithmetic number, because the mean of its divisors is an integer number (63658115755).

Almost surely, 2^127316231509 is an apocalyptic number.

It is an amenable number.

127316231509 is a deficient number, since it is larger than the sum of its proper divisors (1).

127316231509 is an equidigital number, since it uses as much as digits as its factorization.

127316231509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 127316231509 in words is "one hundred twenty-seven billion, three hundred sixteen million, two hundred thirty-one thousand, five hundred nine".