61286549 has 2 divisors, whose sum is σ = 61286550. Its totient is φ = 61286548.

The previous prime is 61286509. The next prime is 61286569. The reversal of 61286549 is 94568216.

It is a happy number.

61286549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58629649 + 2656900 = 7657^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 61286549 - 2⁸ = 61286293 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 (61286509) 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 as a sum of consecutive naturals, namely, 30643274 + 30643275.

It is an arithmetic number, because the mean of its divisors is an integer number (30643275).

Almost surely, 2^61286549 is an apocalyptic number.

It is an amenable number.

61286549 is a deficient number, since it is larger than the sum of its proper divisors (1).

61286549 is an equidigital number, since it uses as much as digits as its factorization.

61286549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 61286549 is about 7828.5726029718. The cubic root of 61286549 is about 394.2651487246.

The spelling of 61286549 in words is "sixty-one million, two hundred eighty-six thousand, five hundred forty-nine".