721543634730983 has 2 divisors, whose sum is σ = 721543634730984. Its totient is φ = 721543634730982.

The previous prime is 721543634730977. The next prime is 721543634731033. The reversal of 721543634730983 is 389037436345127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 721543634730983 - 2³⁴ = 721526454861799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721543634730883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360771817365491 + 360771817365492.

It is an arithmetic number, because the mean of its divisors is an integer number (360771817365492).

It is a 1-persistent number, because it is pandigital, but 2⋅721543634730983 = 1443087269461966 is not.

Almost surely, 2^{721543634730983} is an apocalyptic number.

721543634730983 is a deficient number, since it is larger than the sum of its proper divisors (1).

721543634730983 is an equidigital number, since it uses as much as digits as its factorization.

721543634730983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 274337280, while the sum is 65.

The spelling of 721543634730983 in words is "seven hundred twenty-one trillion, five hundred forty-three billion, six hundred thirty-four million, seven hundred thirty thousand, nine hundred eighty-three".