720281641 has 2 divisors, whose sum is σ = 720281642. Its totient is φ = 720281640.

The previous prime is 720281603. The next prime is 720281647. The reversal of 720281641 is 146182027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706443241 + 13838400 = 26579^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 720281641 - 2¹⁷ = 720150569 is a prime.

It is not a weakly prime, because it can be changed into another prime (720281647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360140820 + 360140821.

It is an arithmetic number, because the mean of its divisors is an integer number (360140821).

Almost surely, 2^720281641 is an apocalyptic number.

It is an amenable number.

720281641 is a deficient number, since it is larger than the sum of its proper divisors (1).

720281641 is an equidigital number, since it uses as much as digits as its factorization.

720281641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 720281641 is about 26838.0632870556. The cubic root of 720281641 is about 896.3977995688.

The spelling of 720281641 in words is "seven hundred twenty million, two hundred eighty-one thousand, six hundred forty-one".