720477673 has 2 divisors, whose sum is σ = 720477674. Its totient is φ = 720477672.

The previous prime is 720477671. The next prime is 720477721. The reversal of 720477673 is 376774027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371834089 + 348643584 = 19283^2 + 18672^2 .

It is a cyclic number.

It is not a de Polignac number, because 720477673 - 2¹ = 720477671 is a prime.

Together with 720477671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (720477671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360238836 + 360238837.

It is an arithmetic number, because the mean of its divisors is an integer number (360238837).

Almost surely, 2^720477673 is an apocalyptic number.

It is an amenable number.

720477673 is a deficient number, since it is larger than the sum of its proper divisors (1).

720477673 is an equidigital number, since it uses as much as digits as its factorization.

720477673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345744, while the sum is 43.

The square root of 720477673 is about 26841.7151650188. The cubic root of 720477673 is about 896.4791134624.

The spelling of 720477673 in words is "seven hundred twenty million, four hundred seventy-seven thousand, six hundred seventy-three".