86442149 has 4 divisors (see below), whose sum is σ = 86718636. Its totient is φ = 86165664.

The previous prime is 86442113. The next prime is 86442151. The reversal of 86442149 is 94124468.

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 17850625 + 68591524 = 4225^2 + 8282^2 .

It is a cyclic number.

It is not a de Polignac number, because 86442149 - 2⁸ = 86441893 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 (86442179) 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, 137774 + ... + 138399.

It is an arithmetic number, because the mean of its divisors is an integer number (21679659).

Almost surely, 2^86442149 is an apocalyptic number.

It is an amenable number.

86442149 is a deficient number, since it is larger than the sum of its proper divisors (276487).

86442149 is a wasteful number, since it uses less digits than its factorization.

86442149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276486.

The product of its digits is 55296, while the sum is 38.

The square root of 86442149 is about 9297.4270096624. The cubic root of 86442149 is about 442.1556562259.

The spelling of 86442149 in words is "eighty-six million, four hundred forty-two thousand, one hundred forty-nine".