78531127 has 2 divisors, whose sum is σ = 78531128. Its totient is φ = 78531126.

The previous prime is 78531119. The next prime is 78531151. The reversal of 78531127 is 72113587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78531127 - 2³ = 78531119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78531092 and 78531101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78531227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39265563 + 39265564.

It is an arithmetic number, because the mean of its divisors is an integer number (39265564).

Almost surely, 2^78531127 is an apocalyptic number.

78531127 is a deficient number, since it is larger than the sum of its proper divisors (1).

78531127 is an equidigital number, since it uses as much as digits as its factorization.

78531127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 78531127 is about 8861.7789974700. The cubic root of 78531127 is about 428.2334719872.

The spelling of 78531127 in words is "seventy-eight million, five hundred thirty-one thousand, one hundred twenty-seven".