721375043 has 2 divisors, whose sum is σ = 721375044. Its totient is φ = 721375042.

The previous prime is 721375021. The next prime is 721375091. The reversal of 721375043 is 340573127.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721375043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (721275043) 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, 360687521 + 360687522.

It is an arithmetic number, because the mean of its divisors is an integer number (360687522).

Almost surely, 2^721375043 is an apocalyptic number.

721375043 is a deficient number, since it is larger than the sum of its proper divisors (1).

721375043 is an equidigital number, since it uses as much as digits as its factorization.

721375043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 721375043 is about 26858.4259218592. The cubic root of 721375043 is about 896.8511535348.

The spelling of 721375043 in words is "seven hundred twenty-one million, three hundred seventy-five thousand, forty-three".