86078977 has 2 divisors, whose sum is σ = 86078978. Its totient is φ = 86078976.

The previous prime is 86078969. The next prime is 86079013. The reversal of 86078977 is 77987068.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62663056 + 23415921 = 7916^2 + 4839^2 .

It is a cyclic number.

It is not a de Polignac number, because 86078977 - 2³ = 86078969 is a prime.

It is not a weakly prime, because it can be changed into another prime (86078917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43039488 + 43039489.

It is an arithmetic number, because the mean of its divisors is an integer number (43039489).

Almost surely, 2^86078977 is an apocalyptic number.

It is an amenable number.

86078977 is a deficient number, since it is larger than the sum of its proper divisors (1).

86078977 is an equidigital number, since it uses as much as digits as its factorization.

86078977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 86078977 is about 9277.8756728036. The cubic root of 86078977 is about 441.5355730706.

The spelling of 86078977 in words is "eighty-six million, seventy-eight thousand, nine hundred seventy-seven".