721934471933 has 2 divisors, whose sum is σ = 721934471934. Its totient is φ = 721934471932.

The previous prime is 721934471887. The next prime is 721934471957. The reversal of 721934471933 is 339174439127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395341652644 + 326592819289 = 628762^2 + 571483^2 .

It is a cyclic number.

It is not a de Polignac number, because 721934471933 - 2²⁸ = 721666036477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721934461933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360967235966 + 360967235967.

It is an arithmetic number, because the mean of its divisors is an integer number (360967235967).

Almost surely, 2^721934471933 is an apocalyptic number.

It is an amenable number.

721934471933 is a deficient number, since it is larger than the sum of its proper divisors (1).

721934471933 is an equidigital number, since it uses as much as digits as its factorization.

721934471933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 53.

The spelling of 721934471933 in words is "seven hundred twenty-one billion, nine hundred thirty-four million, four hundred seventy-one thousand, nine hundred thirty-three".