86578319 has 8 divisors (see below), whose sum is σ = 89511552. Its totient is φ = 83653920.

The previous prime is 86578291. The next prime is 86578339. The reversal of 86578319 is 91387568.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86578319 - 2¹² = 86574223 is a prime.

It is a super-2 number, since 2×86578319² = 14991610641731522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86578339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22157 + ... + 25769.

It is an arithmetic number, because the mean of its divisors is an integer number (11188944).

Almost surely, 2^86578319 is an apocalyptic number.

86578319 is a deficient number, since it is larger than the sum of its proper divisors (2933233).

86578319 is a wasteful number, since it uses less digits than its factorization.

86578319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417.

The product of its digits is 362880, while the sum is 47.

The square root of 86578319 is about 9304.7471217653. The cubic root of 86578319 is about 442.3877064051.

Subtracting 86578319 from its reverse (91387568), we obtain a square (4809249 = 2193²).

The spelling of 86578319 in words is "eighty-six million, five hundred seventy-eight thousand, three hundred nineteen".