86978747 has 2 divisors, whose sum is σ = 86978748. Its totient is φ = 86978746.

The previous prime is 86978719. The next prime is 86978761. The reversal of 86978747 is 74787968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86978747 - 2⁸ = 86978491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86978692 and 86978701.

It is not a weakly prime, because it can be changed into another prime (86978707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43489373 + 43489374.

It is an arithmetic number, because the mean of its divisors is an integer number (43489374).

Almost surely, 2^86978747 is an apocalyptic number.

86978747 is a deficient number, since it is larger than the sum of its proper divisors (1).

86978747 is an equidigital number, since it uses as much as digits as its factorization.

86978747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 56.

The square root of 86978747 is about 9326.2397031172. The cubic root of 86978747 is about 443.0686776006.

The spelling of 86978747 in words is "eighty-six million, nine hundred seventy-eight thousand, seven hundred forty-seven".