61549141 has 2 divisors, whose sum is σ = 61549142. Its totient is φ = 61549140.

The previous prime is 61549133. The next prime is 61549157. The reversal of 61549141 is 14194516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37822500 + 23726641 = 6150^2 + 4871^2 .

It is a cyclic number.

It is not a de Polignac number, because 61549141 - 2³ = 61549133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61549121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30774570 + 30774571.

It is an arithmetic number, because the mean of its divisors is an integer number (30774571).

Almost surely, 2^61549141 is an apocalyptic number.

It is an amenable number.

61549141 is a deficient number, since it is larger than the sum of its proper divisors (1).

61549141 is an equidigital number, since it uses as much as digits as its factorization.

61549141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 61549141 is about 7845.3260607829. The cubic root of 61549141 is about 394.8274437237.

The spelling of 61549141 in words is "sixty-one million, five hundred forty-nine thousand, one hundred forty-one".