127716431 has 2 divisors, whose sum is σ = 127716432. Its totient is φ = 127716430.

The previous prime is 127716403. The next prime is 127716439. The reversal of 127716431 is 134617721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127716431 is a prime.

It is a super-2 number, since 2×127716431² = 32622973494755522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127716439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63858215 + 63858216.

It is an arithmetic number, because the mean of its divisors is an integer number (63858216).

Almost surely, 2^127716431 is an apocalyptic number.

127716431 is a deficient number, since it is larger than the sum of its proper divisors (1).

127716431 is an equidigital number, since it uses as much as digits as its factorization.

127716431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 127716431 is about 11301.1694527602. The cubic root of 127716431 is about 503.5959838010.

The spelling of 127716431 in words is "one hundred twenty-seven million, seven hundred sixteen thousand, four hundred thirty-one".