86311549 has 4 divisors (see below), whose sum is σ = 86330236. Its totient is φ = 86292864.

The previous prime is 86311543. The next prime is 86311579. The reversal of 86311549 is 94511368.

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 60372900 + 25938649 = 7770^2 + 5093^2 .

It is a cyclic number.

It is not a de Polignac number, because 86311549 - 2⁵ = 86311517 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 (86311543) 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, 3187 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (21582559).

Almost surely, 2^86311549 is an apocalyptic number.

It is an amenable number.

86311549 is a deficient number, since it is larger than the sum of its proper divisors (18687).

86311549 is a wasteful number, since it uses less digits than its factorization.

86311549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18686.

The product of its digits is 25920, while the sum is 37.

The square root of 86311549 is about 9290.4009063118. The cubic root of 86311549 is about 441.9328689431.

The spelling of 86311549 in words is "eighty-six million, three hundred eleven thousand, five hundred forty-nine".