61512289 has 2 divisors, whose sum is σ = 61512290. Its totient is φ = 61512288.

The previous prime is 61512251. The next prime is 61512337. The reversal of 61512289 is 98221516.

61512289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 21316689 = 6340^2 + 4617^2 .

It is a cyclic number.

It is not a de Polignac number, because 61512289 - 2⁹ = 61511777 is a prime.

It is not a weakly prime, because it can be changed into another prime (61512089) 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, 30756144 + 30756145.

It is an arithmetic number, because the mean of its divisors is an integer number (30756145).

Almost surely, 2^61512289 is an apocalyptic number.

It is an amenable number.

61512289 is a deficient number, since it is larger than the sum of its proper divisors (1).

61512289 is an equidigital number, since it uses as much as digits as its factorization.

61512289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 61512289 is about 7842.9770495648. The cubic root of 61512289 is about 394.7486281864.

The spelling of 61512289 in words is "sixty-one million, five hundred twelve thousand, two hundred eighty-nine".