86148989 has 4 divisors (see below), whose sum is σ = 86176860. Its totient is φ = 86121120.

The previous prime is 86148977. The next prime is 86148991. The reversal of 86148989 is 98984168.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53772889 + 32376100 = 7333^2 + 5690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86148989 is a prime.

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 86148989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86148919) 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, 8624 + ... + 15705.

It is an arithmetic number, because the mean of its divisors is an integer number (21544215).

Almost surely, 2^86148989 is an apocalyptic number.

It is an amenable number.

86148989 is a deficient number, since it is larger than the sum of its proper divisors (27871).

86148989 is a wasteful number, since it uses less digits than its factorization.

86148989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27870.

The product of its digits is 995328, while the sum is 53.

The square root of 86148989 is about 9281.6479678988. The cubic root of 86148989 is about 441.6552477092.

The spelling of 86148989 in words is "eighty-six million, one hundred forty-eight thousand, nine hundred eighty-nine".