86078169 has 24 divisors (see below), whose sum is σ = 129481352. Its totient is φ = 55054080.

The previous prime is 86078149. The next prime is 86078171. The reversal of 86078169 is 96187068.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28515600 + 57562569 = 5340^2 + 7587^2 .

It is not a de Polignac number, because 86078169 - 2⁸ = 86077913 is a prime.

It is a super-2 number, since 2×86078169² = 14818902356785122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86078149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22539 + ... + 26079.

Almost surely, 2^86078169 is an apocalyptic number.

It is an amenable number.

86078169 is a deficient number, since it is larger than the sum of its proper divisors (43403183).

86078169 is a wasteful number, since it uses less digits than its factorization.

86078169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657 (or 3654 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 86078169 is about 9277.8321282507. The cubic root of 86078169 is about 441.5341915414.

The spelling of 86078169 in words is "eighty-six million, seventy-eight thousand, one hundred sixty-nine".