61421849 has 2 divisors, whose sum is σ = 61421850. Its totient is φ = 61421848.

The previous prime is 61421821. The next prime is 61421861. The reversal of 61421849 is 94812416.

It is a happy number.

61421849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 7252249 = 7360^2 + 2693^2 .

It is a cyclic number.

It is not a de Polignac number, because 61421849 - 2⁸ = 61421593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61421749) 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, 30710924 + 30710925.

It is an arithmetic number, because the mean of its divisors is an integer number (30710925).

Almost surely, 2^61421849 is an apocalyptic number.

It is an amenable number.

61421849 is a deficient number, since it is larger than the sum of its proper divisors (1).

61421849 is an equidigital number, since it uses as much as digits as its factorization.

61421849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 61421849 is about 7837.2092609551. The cubic root of 61421849 is about 394.5550702399. Note that the first 3 decimals are identical.

The spelling of 61421849 in words is "sixty-one million, four hundred twenty-one thousand, eight hundred forty-nine".