140537549 has 4 divisors (see below), whose sum is σ = 140596764. Its totient is φ = 140478336.

The previous prime is 140537543. The next prime is 140537563. The reversal of 140537549 is 945735041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945735041 = 17 ⋅55631473.

It can be written as a sum of positive squares in 2 ways, for example, as 76825225 + 63712324 = 8765^2 + 7982^2 .

It is a cyclic number.

It is not a de Polignac number, because 140537549 - 2⁴ = 140537533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140537543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25892 + ... + 30845.

It is an arithmetic number, because the mean of its divisors is an integer number (35149191).

Almost surely, 2^140537549 is an apocalyptic number.

It is an amenable number.

140537549 is a deficient number, since it is larger than the sum of its proper divisors (59215).

140537549 is an equidigital number, since it uses as much as digits as its factorization.

140537549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59214.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 140537549 is about 11854.8533942854. The cubic root of 140537549 is about 519.9131376114.

The spelling of 140537549 in words is "one hundred forty million, five hundred thirty-seven thousand, five hundred forty-nine".