721206043 has 2 divisors, whose sum is σ = 721206044. Its totient is φ = 721206042.

The previous prime is 721205999. The next prime is 721206053. The reversal of 721206043 is 340602127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721206043 - 2²⁵ = 687651611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 721205999 and 721206017.

It is not a weakly prime, because it can be changed into another prime (721206053) 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, 360603021 + 360603022.

It is an arithmetic number, because the mean of its divisors is an integer number (360603022).

Almost surely, 2^721206043 is an apocalyptic number.

721206043 is a deficient number, since it is larger than the sum of its proper divisors (1).

721206043 is an equidigital number, since it uses as much as digits as its factorization.

721206043 is an odious number, because the sum of its binary digits is odd.

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

The square root of 721206043 is about 26855.2796112794. The cubic root of 721206043 is about 896.7811115208.

The spelling of 721206043 in words is "seven hundred twenty-one million, two hundred six thousand, forty-three".