723034561 has 2 divisors, whose sum is σ = 723034562. Its totient is φ = 723034560.

The previous prime is 723034553. The next prime is 723034573. The reversal of 723034561 is 165430327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639128961 + 83905600 = 25281^2 + 9160^2 .

It is a cyclic number.

It is not a de Polignac number, because 723034561 - 2³ = 723034553 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is equal to p_37383025 and since 723034561 and 37383025 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (723035561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361517280 + 361517281.

It is an arithmetic number, because the mean of its divisors is an integer number (361517281).

Almost surely, 2^723034561 is an apocalyptic number.

It is an amenable number.

723034561 is a deficient number, since it is larger than the sum of its proper divisors (1).

723034561 is an equidigital number, since it uses as much as digits as its factorization.

723034561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 723034561 is about 26889.3019805275. The cubic root of 723034561 is about 897.5383600015.

Adding to 723034561 its reverse (165430327), we get a palindrome (888464888).

The spelling of 723034561 in words is "seven hundred twenty-three million, thirty-four thousand, five hundred sixty-one".