1205654507983 has 2 divisors, whose sum is σ = 1205654507984. Its totient is φ = 1205654507982.

The previous prime is 1205654507929. The next prime is 1205654508017. The reversal of 1205654507983 is 3897054565021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205654507983 - 2³³ = 1197064573391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205654507903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602827253991 + 602827253992.

It is an arithmetic number, because the mean of its divisors is an integer number (602827253992).

It is a 1-persistent number, because it is pandigital, but 2⋅1205654507983 = 2411309015966 is not.

Almost surely, 2^{1205654507983} is an apocalyptic number.

1205654507983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205654507983 is an equidigital number, since it uses as much as digits as its factorization.

1205654507983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 55.

The spelling of 1205654507983 in words is "one trillion, two hundred five billion, six hundred fifty-four million, five hundred seven thousand, nine hundred eighty-three".