86784149 has 4 divisors (see below), whose sum is σ = 87643500. Its totient is φ = 85924800.

The previous prime is 86784127. The next prime is 86784163. The reversal of 86784149 is 94148768.

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 55502500 + 31281649 = 7450^2 + 5593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86784149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86784109) 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, 429524 + ... + 429725.

It is an arithmetic number, because the mean of its divisors is an integer number (21910875).

Almost surely, 2^86784149 is an apocalyptic number.

It is an amenable number.

86784149 is a deficient number, since it is larger than the sum of its proper divisors (859351).

86784149 is a wasteful number, since it uses less digits than its factorization.

86784149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859350.

The product of its digits is 387072, while the sum is 47.

The square root of 86784149 is about 9315.8010390948. The cubic root of 86784149 is about 442.7380042583.

The spelling of 86784149 in words is "eighty-six million, seven hundred eighty-four thousand, one hundred forty-nine".