61436321 has 2 divisors, whose sum is σ = 61436322. Its totient is φ = 61436320.

The previous prime is 61436311. The next prime is 61436357. The reversal of 61436321 is 12363416.

61436321 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., 41731600 + 19704721 = 6460^2 + 4439^2 .

It is a cyclic number.

It is not a de Polignac number, because 61436321 - 2⁶ = 61436257 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (61436311) 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, 30718160 + 30718161.

It is an arithmetic number, because the mean of its divisors is an integer number (30718161).

Almost surely, 2^61436321 is an apocalyptic number.

It is an amenable number.

61436321 is a deficient number, since it is larger than the sum of its proper divisors (1).

61436321 is an equidigital number, since it uses as much as digits as its factorization.

61436321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 61436321 is about 7838.1324944147. The cubic root of 61436321 is about 394.5860556990.

Adding to 61436321 its reverse (12363416), we get a palindrome (73799737).

The spelling of 61436321 in words is "sixty-one million, four hundred thirty-six thousand, three hundred twenty-one".