723989145601 has 2 divisors, whose sum is σ = 723989145602. Its totient is φ = 723989145600.

The previous prime is 723989145599. The next prime is 723989145623. The reversal of 723989145601 is 106541989327.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 584674329600 + 139314816001 = 764640^2 + 373249^2 .

It is a cyclic number.

It is not a de Polignac number, because 723989145601 - 2¹ = 723989145599 is a prime.

Together with 723989145599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (723989145641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361994572800 + 361994572801.

It is an arithmetic number, because the mean of its divisors is an integer number (361994572801).

It is a 1-persistent number, because it is pandigital, but 2⋅723989145601 = 1447978291202 is not.

Almost surely, 2^723989145601 is an apocalyptic number.

It is an amenable number.

723989145601 is a deficient number, since it is larger than the sum of its proper divisors (1).

723989145601 is an equidigital number, since it uses as much as digits as its factorization.

723989145601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 723989145601 in words is "seven hundred twenty-three billion, nine hundred eighty-nine million, one hundred forty-five thousand, six hundred one".