720318901 has 2 divisors, whose sum is σ = 720318902. Its totient is φ = 720318900.

The previous prime is 720318887. The next prime is 720318913. The reversal of 720318901 is 109813027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531256401 + 189062500 = 23049^2 + 13750^2 .

It is a cyclic number.

It is not a de Polignac number, because 720318901 - 2⁵ = 720318869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720310901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360159450 + 360159451.

It is an arithmetic number, because the mean of its divisors is an integer number (360159451).

Almost surely, 2^720318901 is an apocalyptic number.

It is an amenable number.

720318901 is a deficient number, since it is larger than the sum of its proper divisors (1).

720318901 is an equidigital number, since it uses as much as digits as its factorization.

720318901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 720318901 is about 26838.7574414316. The cubic root of 720318901 is about 896.4132561181.

The spelling of 720318901 in words is "seven hundred twenty million, three hundred eighteen thousand, nine hundred one".