721646083 has 2 divisors, whose sum is σ = 721646084. Its totient is φ = 721646082.

The previous prime is 721646077. The next prime is 721646129. The reversal of 721646083 is 380646127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 721646083 - 2⁹ = 721645571 is a prime.

It is not a weakly prime, because it can be changed into another prime (721646033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360823041 + 360823042.

It is an arithmetic number, because the mean of its divisors is an integer number (360823042).

Almost surely, 2^721646083 is an apocalyptic number.

721646083 is a deficient number, since it is larger than the sum of its proper divisors (1).

721646083 is an equidigital number, since it uses as much as digits as its factorization.

721646083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 721646083 is about 26863.4711643898. The cubic root of 721646083 is about 896.9634631677.

The spelling of 721646083 in words is "seven hundred twenty-one million, six hundred forty-six thousand, eighty-three".