86838149 has 4 divisors (see below), whose sum is σ = 89185164. Its totient is φ = 84491136.

The previous prime is 86838121. The next prime is 86838173. The reversal of 86838149 is 94183868.

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 59985025 + 26853124 = 7745^2 + 5182^2 .

It is a cyclic number.

It is not a de Polignac number, because 86838149 - 2⁸ = 86837893 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 (86838649) 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, 1173452 + ... + 1173525.

It is an arithmetic number, because the mean of its divisors is an integer number (22296291).

Almost surely, 2^86838149 is an apocalyptic number.

It is an amenable number.

86838149 is a deficient number, since it is larger than the sum of its proper divisors (2347015).

86838149 is a wasteful number, since it uses less digits than its factorization.

86838149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347014.

The product of its digits is 331776, while the sum is 47.

The square root of 86838149 is about 9318.6988898665. The cubic root of 86838149 is about 442.8298140165.

The spelling of 86838149 in words is "eighty-six million, eight hundred thirty-eight thousand, one hundred forty-nine".