723378541 has 4 divisors (see below), whose sum is σ = 724204252. Its totient is φ = 722552832.

The previous prime is 723378533. The next prime is 723378547. The reversal of 723378541 is 145873327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145873327 = 829 ⋅175963.

It can be written as a sum of positive squares in 2 ways, for example, as 318765316 + 404613225 = 17854^2 + 20115^2 .

It is a cyclic number.

It is not a de Polignac number, because 723378541 - 2³ = 723378533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 723378494 and 723378503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723378547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411540 + ... + 413293.

It is an arithmetic number, because the mean of its divisors is an integer number (181051063).

Almost surely, 2^723378541 is an apocalyptic number.

It is an amenable number.

723378541 is a deficient number, since it is larger than the sum of its proper divisors (825711).

723378541 is an equidigital number, since it uses as much as digits as its factorization.

723378541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825710.

The product of its digits is 141120, while the sum is 40.

The square root of 723378541 is about 26895.6974440151. The cubic root of 723378541 is about 897.6806705332.

The spelling of 723378541 in words is "seven hundred twenty-three million, three hundred seventy-eight thousand, five hundred forty-one".