78085727 has 2 divisors, whose sum is σ = 78085728. Its totient is φ = 78085726.

The previous prime is 78085723. The next prime is 78085739. The reversal of 78085727 is 72758087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78085727 - 2² = 78085723 is a prime.

It is a super-2 number, since 2×78085727² = 12194761522237058, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78085723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39042863 + 39042864.

It is an arithmetic number, because the mean of its divisors is an integer number (39042864).

Almost surely, 2^78085727 is an apocalyptic number.

78085727 is a deficient number, since it is larger than the sum of its proper divisors (1).

78085727 is an equidigital number, since it uses as much as digits as its factorization.

78085727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 78085727 is about 8836.6128691937. The cubic root of 78085727 is about 427.4223417183.

The spelling of 78085727 in words is "seventy-eight million, eighty-five thousand, seven hundred twenty-seven".