721059797 has 2 divisors, whose sum is σ = 721059798. Its totient is φ = 721059796.

The previous prime is 721059791. The next prime is 721059817. The reversal of 721059797 is 797950127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 692426596 + 28633201 = 26314^2 + 5351^2 .

It is a cyclic number.

It is not a de Polignac number, because 721059797 - 2¹⁰ = 721058773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721059791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360529898 + 360529899.

It is an arithmetic number, because the mean of its divisors is an integer number (360529899).

Almost surely, 2^721059797 is an apocalyptic number.

It is an amenable number.

721059797 is a deficient number, since it is larger than the sum of its proper divisors (1).

721059797 is an equidigital number, since it uses as much as digits as its factorization.

721059797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 277830, while the sum is 47.

The square root of 721059797 is about 26852.5566194357. The cubic root of 721059797 is about 896.7204910654.

The spelling of 721059797 in words is "seven hundred twenty-one million, fifty-nine thousand, seven hundred ninety-seven".