86421970 has 8 divisors (see below), whose sum is σ = 155559564. Its totient is φ = 34568784.

The previous prime is 86421967. The next prime is 86421983. The reversal of 86421970 is 7912468.

It can be written as a sum of positive squares in 2 ways, for example, as 85544001 + 877969 = 9249^2 + 937^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4321089 + ... + 4321108.

Almost surely, 2^86421970 is an apocalyptic number.

86421970 is a deficient number, since it is larger than the sum of its proper divisors (69137594).

86421970 is a wasteful number, since it uses less digits than its factorization.

86421970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642204.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 86421970 is about 9296.3417536147. The cubic root of 86421970 is about 442.1212480371.

The spelling of 86421970 in words is "eighty-six million, four hundred twenty-one thousand, nine hundred seventy".