86778007 has 2 divisors, whose sum is σ = 86778008. Its totient is φ = 86778006.

The previous prime is 86777993. The next prime is 86778031. The reversal of 86778007 is 70087768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86778007 - 2⁷ = 86777879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86778067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43389003 + 43389004.

It is an arithmetic number, because the mean of its divisors is an integer number (43389004).

Almost surely, 2^86778007 is an apocalyptic number.

86778007 is a deficient number, since it is larger than the sum of its proper divisors (1).

86778007 is an equidigital number, since it uses as much as digits as its factorization.

86778007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 86778007 is about 9315.4713783039. The cubic root of 86778007 is about 442.7275593364.

The spelling of 86778007 in words is "eighty-six million, seven hundred seventy-eight thousand, seven".