61946389 has 2 divisors, whose sum is σ = 61946390. Its totient is φ = 61946388.

The previous prime is 61946377. The next prime is 61946411. The reversal of 61946389 is 98364916.

61946389 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., 38229489 + 23716900 = 6183^2 + 4870^2 .

It is a cyclic number.

It is not a de Polignac number, because 61946389 - 2¹³ = 61938197 is a prime.

It is a super-2 number, since 2×61946389² = 7674710220278642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61946309) 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, 30973194 + 30973195.

It is an arithmetic number, because the mean of its divisors is an integer number (30973195).

Almost surely, 2^61946389 is an apocalyptic number.

It is an amenable number.

61946389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61946389 is an equidigital number, since it uses as much as digits as its factorization.

61946389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 61946389 is about 7870.6028358697. The cubic root of 61946389 is about 395.6750492932.

The spelling of 61946389 in words is "sixty-one million, nine hundred forty-six thousand, three hundred eighty-nine".