720727901 has 2 divisors, whose sum is σ = 720727902. Its totient is φ = 720727900.

The previous prime is 720727879. The next prime is 720727907. The reversal of 720727901 is 109727027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419184676 + 301543225 = 20474^2 + 17365^2 .

It is a cyclic number.

It is not a de Polignac number, because 720727901 - 2¹⁴ = 720711517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720727907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360363950 + 360363951.

It is an arithmetic number, because the mean of its divisors is an integer number (360363951).

Almost surely, 2^720727901 is an apocalyptic number.

It is an amenable number.

720727901 is a deficient number, since it is larger than the sum of its proper divisors (1).

720727901 is an equidigital number, since it uses as much as digits as its factorization.

720727901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 720727901 is about 26846.3759379176. The cubic root of 720727901 is about 896.5828863801.

The spelling of 720727901 in words is "seven hundred twenty million, seven hundred twenty-seven thousand, nine hundred one".