720601501 has 2 divisors, whose sum is σ = 720601502. Its totient is φ = 720601500.

The previous prime is 720601499. The next prime is 720601513. The reversal of 720601501 is 105106027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640140601 + 80460900 = 25301^2 + 8970^2 .

It is a cyclic number.

It is not a de Polignac number, because 720601501 - 2¹ = 720601499 is a prime.

Together with 720601499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720601801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360300750 + 360300751.

It is an arithmetic number, because the mean of its divisors is an integer number (360300751).

Almost surely, 2^720601501 is an apocalyptic number.

It is an amenable number.

720601501 is a deficient number, since it is larger than the sum of its proper divisors (1).

720601501 is an equidigital number, since it uses as much as digits as its factorization.

720601501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 720601501 is about 26844.0216994399. The cubic root of 720601501 is about 896.5304696024.

Adding to 720601501 its reverse (105106027), we get a palindrome (825707528).

The spelling of 720601501 in words is "seven hundred twenty million, six hundred one thousand, five hundred one".