721341223 has 2 divisors, whose sum is σ = 721341224. Its totient is φ = 721341222.

The previous prime is 721341209. The next prime is 721341227. The reversal of 721341223 is 322143127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721341223 - 2²⁹ = 184470311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721341227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360670611 + 360670612.

It is an arithmetic number, because the mean of its divisors is an integer number (360670612).

Almost surely, 2^721341223 is an apocalyptic number.

721341223 is a deficient number, since it is larger than the sum of its proper divisors (1).

721341223 is an equidigital number, since it uses as much as digits as its factorization.

721341223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 721341223 is about 26857.7963168984. The cubic root of 721341223 is about 896.8371377186.

The spelling of 721341223 in words is "seven hundred twenty-one million, three hundred forty-one thousand, two hundred twenty-three".