86689819 has 4 divisors (see below), whose sum is σ = 87372544. Its totient is φ = 86007096.

The previous prime is 86689789. The next prime is 86689831. The reversal of 86689819 is 91898668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86689819 - 2¹⁹ = 86165531 is a prime.

It is a super-2 number, since 2×86689819² = 15030249436505522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86689819.

It is not an unprimeable number, because it can be changed into a prime (86689019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341172 + ... + 341425.

It is an arithmetic number, because the mean of its divisors is an integer number (21843136).

Almost surely, 2^86689819 is an apocalyptic number.

86689819 is a deficient number, since it is larger than the sum of its proper divisors (682725).

86689819 is a wasteful number, since it uses less digits than its factorization.

86689819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682724.

The product of its digits is 1492992, while the sum is 55.

The square root of 86689819 is about 9310.7367592474. The cubic root of 86689819 is about 442.5775347979.

The spelling of 86689819 in words is "eighty-six million, six hundred eighty-nine thousand, eight hundred nineteen".