723661033 has 2 divisors, whose sum is σ = 723661034. Its totient is φ = 723661032.

The previous prime is 723660967. The next prime is 723661051. The reversal of 723661033 is 330166327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460832089 + 262828944 = 21467^2 + 16212^2 .

It is an emirp because it is prime and its reverse (330166327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723661033 - 2⁹ = 723660521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 723660986 and 723661004.

It is not a weakly prime, because it can be changed into another prime (723661633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361830516 + 361830517.

It is an arithmetic number, because the mean of its divisors is an integer number (361830517).

Almost surely, 2^723661033 is an apocalyptic number.

It is an amenable number.

723661033 is a deficient number, since it is larger than the sum of its proper divisors (1).

723661033 is an equidigital number, since it uses as much as digits as its factorization.

723661033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 723661033 is about 26900.9485520492. The cubic root of 723661033 is about 897.7975086710.

The spelling of 723661033 in words is "seven hundred twenty-three million, six hundred sixty-one thousand, thirty-three".