61924561 has 2 divisors, whose sum is σ = 61924562. Its totient is φ = 61924560.

The previous prime is 61924559. The next prime is 61924613. The reversal of 61924561 is 16542916.

61924561 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., 45481536 + 16443025 = 6744^2 + 4055^2 .

It is a cyclic number.

It is not a de Polignac number, because 61924561 - 2¹ = 61924559 is a prime.

Together with 61924559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61924501) 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, 30962280 + 30962281.

It is an arithmetic number, because the mean of its divisors is an integer number (30962281).

Almost surely, 2^61924561 is an apocalyptic number.

It is an amenable number.

61924561 is a deficient number, since it is larger than the sum of its proper divisors (1).

61924561 is an equidigital number, since it uses as much as digits as its factorization.

61924561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 61924561 is about 7869.2160346505. The cubic root of 61924561 is about 395.6285692655.

The spelling of 61924561 in words is "sixty-one million, nine hundred twenty-four thousand, five hundred sixty-one".