86719639 has 4 divisors (see below), whose sum is σ = 87301800. Its totient is φ = 86137480.

The previous prime is 86719627. The next prime is 86719663. The reversal of 86719639 is 93691768.

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 86719639 - 2¹¹ = 86717591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86719592 and 86719601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86719609) 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, 290857 + ... + 291154.

It is an arithmetic number, because the mean of its divisors is an integer number (21825450).

Almost surely, 2^86719639 is an apocalyptic number.

86719639 is a deficient number, since it is larger than the sum of its proper divisors (582161).

86719639 is a wasteful number, since it uses less digits than its factorization.

86719639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582160.

The product of its digits is 489888, while the sum is 49.

The square root of 86719639 is about 9312.3379985909. The cubic root of 86719639 is about 442.6282756625.

The spelling of 86719639 in words is "eighty-six million, seven hundred nineteen thousand, six hundred thirty-nine".