61420873 has 2 divisors, whose sum is σ = 61420874. Its totient is φ = 61420872.

The previous prime is 61420871. The next prime is 61420921. The reversal of 61420873 is 37802416.

61420873 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., 61418569 + 2304 = 7837^2 + 48^2 .

It is a cyclic number.

It is not a de Polignac number, because 61420873 - 2¹ = 61420871 is a prime.

Together with 61420871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61420871) 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, 30710436 + 30710437.

It is an arithmetic number, because the mean of its divisors is an integer number (30710437).

Almost surely, 2^61420873 is an apocalyptic number.

It is an amenable number.

61420873 is a deficient number, since it is larger than the sum of its proper divisors (1).

61420873 is an equidigital number, since it uses as much as digits as its factorization.

61420873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 61420873 is about 7837.1469936451. The cubic root of 61420873 is about 394.5529803875.

The spelling of 61420873 in words is "sixty-one million, four hundred twenty thousand, eight hundred seventy-three".