723437081 has 4 divisors (see below), whose sum is σ = 733347252. Its totient is φ = 713526912.

The previous prime is 723437069. The next prime is 723437089. The reversal of 723437081 is 180734327.

723437081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171610000 + 551827081 = 13100^2 + 23491^2 .

It is a cyclic number.

It is not a de Polignac number, because 723437081 - 2²⁶ = 656328217 is a prime.

It is a super-2 number, since 2×723437081² = 1046722420331601122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723437089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4954976 + ... + 4955121.

It is an arithmetic number, because the mean of its divisors is an integer number (183336813).

Almost surely, 2^723437081 is an apocalyptic number.

It is an amenable number.

723437081 is a deficient number, since it is larger than the sum of its proper divisors (9910171).

723437081 is an equidigital number, since it uses as much as digits as its factorization.

723437081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910170.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 723437081 is about 26896.7857001538. The cubic root of 723437081 is about 897.7048850608.

The spelling of 723437081 in words is "seven hundred twenty-three million, four hundred thirty-seven thousand, eighty-one".