721478003 has 2 divisors, whose sum is σ = 721478004. Its totient is φ = 721478002.

The previous prime is 721477963. The next prime is 721478033. The reversal of 721478003 is 300874127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721478003 - 2¹⁴ = 721461619 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (721478033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360739001 + 360739002.

It is an arithmetic number, because the mean of its divisors is an integer number (360739002).

Almost surely, 2^721478003 is an apocalyptic number.

721478003 is a deficient number, since it is larger than the sum of its proper divisors (1).

721478003 is an equidigital number, since it uses as much as digits as its factorization.

721478003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 721478003 is about 26860.3425704141. The cubic root of 721478003 is about 896.8938199226.

The spelling of 721478003 in words is "seven hundred twenty-one million, four hundred seventy-eight thousand, three".