860140549 has 2 divisors, whose sum is σ = 860140550. Its totient is φ = 860140548.

The previous prime is 860140529. The next prime is 860140559. The reversal of 860140549 is 945041068.

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., 713851524 + 146289025 = 26718^2 + 12095^2 .

It is a cyclic number.

It is not a de Polignac number, because 860140549 - 2¹¹ = 860138501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860140529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430070274 + 430070275.

It is an arithmetic number, because the mean of its divisors is an integer number (430070275).

Almost surely, 2^860140549 is an apocalyptic number.

It is an amenable number.

860140549 is a deficient number, since it is larger than the sum of its proper divisors (1).

860140549 is an equidigital number, since it uses as much as digits as its factorization.

860140549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 860140549 is about 29328.1528398909. The cubic root of 860140549 is about 951.0203437853.

The spelling of 860140549 in words is "eight hundred sixty million, one hundred forty thousand, five hundred forty-nine".