61304368973 has 2 divisors, whose sum is σ = 61304368974. Its totient is φ = 61304368972.

The previous prime is 61304368943. The next prime is 61304368997. The reversal of 61304368973 is 37986340316.

It is a happy number.

61304368973 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., 48831276484 + 12473092489 = 220978^2 + 111683^2 .

It is a cyclic number.

It is not a de Polignac number, because 61304368973 - 2¹⁴ = 61304352589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61304368903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30652184486 + 30652184487.

It is an arithmetic number, because the mean of its divisors is an integer number (30652184487).

Almost surely, 2^61304368973 is an apocalyptic number.

It is an amenable number.

61304368973 is a deficient number, since it is larger than the sum of its proper divisors (1).

61304368973 is an equidigital number, since it uses as much as digits as its factorization.

61304368973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 61304368973 in words is "sixty-one billion, three hundred four million, three hundred sixty-eight thousand, nine hundred seventy-three".