86541649 has 4 divisors (see below), whose sum is σ = 86598720. Its totient is φ = 86484580.

The previous prime is 86541643. The next prime is 86541691. The reversal of 86541649 is 94614568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86541649 - 2²¹ = 84444497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86541643) 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, 26197 + ... + 29314.

It is an arithmetic number, because the mean of its divisors is an integer number (21649680).

Almost surely, 2^86541649 is an apocalyptic number.

It is an amenable number.

86541649 is a deficient number, since it is larger than the sum of its proper divisors (57071).

86541649 is a wasteful number, since it uses less digits than its factorization.

86541649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57070.

The product of its digits is 207360, while the sum is 43.

The square root of 86541649 is about 9302.7764135230. The cubic root of 86541649 is about 442.3252402348.

The spelling of 86541649 in words is "eighty-six million, five hundred forty-one thousand, six hundred forty-nine".