86722239 has 8 divisors (see below), whose sum is σ = 116462080. Its totient is φ = 57398616.

The previous prime is 86722231. The next prime is 86722241. The reversal of 86722239 is 93222768.

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

It is not a de Polignac number, because 86722239 - 2³ = 86722231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86722197 and 86722206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86722231) 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, 103567 + ... + 104400.

It is an arithmetic number, because the mean of its divisors is an integer number (14557760).

Almost surely, 2^86722239 is an apocalyptic number.

86722239 is a deficient number, since it is larger than the sum of its proper divisors (29739841).

86722239 is a wasteful number, since it uses less digits than its factorization.

86722239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208109.

The product of its digits is 72576, while the sum is 39.

The square root of 86722239 is about 9312.4775972885. The cubic root of 86722239 is about 442.6326991973.

The spelling of 86722239 in words is "eighty-six million, seven hundred twenty-two thousand, two hundred thirty-nine".