61888549 has 2 divisors, whose sum is σ = 61888550. Its totient is φ = 61888548.

The previous prime is 61888543. The next prime is 61888571. The reversal of 61888549 is 94588816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 9108324 = 7265^2 + 3018^2 .

It is a cyclic number.

It is not a de Polignac number, because 61888549 - 2¹¹ = 61886501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61888543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30944274 + 30944275.

It is an arithmetic number, because the mean of its divisors is an integer number (30944275).

Almost surely, 2^61888549 is an apocalyptic number.

It is an amenable number.

61888549 is a deficient number, since it is larger than the sum of its proper divisors (1).

61888549 is an equidigital number, since it uses as much as digits as its factorization.

61888549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 49.

The square root of 61888549 is about 7866.9275451093. The cubic root of 61888549 is about 395.5518622824.

The spelling of 61888549 in words is "sixty-one million, eight hundred eighty-eight thousand, five hundred forty-nine".