86540549 has 2 divisors, whose sum is σ = 86540550. Its totient is φ = 86540548.

The previous prime is 86540527. The next prime is 86540563. The reversal of 86540549 is 94504568.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 29235649 = 7570^2 + 5407^2 .

It is a cyclic number.

It is not a de Polignac number, because 86540549 - 2²⁴ = 69763333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86540579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43270274 + 43270275.

It is an arithmetic number, because the mean of its divisors is an integer number (43270275).

Almost surely, 2^86540549 is an apocalyptic number.

It is an amenable number.

86540549 is a deficient number, since it is larger than the sum of its proper divisors (1).

86540549 is an equidigital number, since it uses as much as digits as its factorization.

86540549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 86540549 is about 9302.7172912005. The cubic root of 86540549 is about 442.3233661475.

It can be divided in two parts, 865 and 40549, that added together give a palindrome (41414).

The spelling of 86540549 in words is "eighty-six million, five hundred forty thousand, five hundred forty-nine".