723575513 has 4 divisors (see below), whose sum is σ = 726045348. Its totient is φ = 721105680.

The previous prime is 723575483. The next prime is 723575563. The reversal of 723575513 is 315575327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315575327 = 4519 ⋅69833.

It can be written as a sum of positive squares in 2 ways, for example, as 303038464 + 420537049 = 17408^2 + 20507^2 .

It is a cyclic number.

It is not a de Polignac number, because 723575513 - 2¹⁶ = 723509977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723575563) 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, 1234478 + ... + 1235063.

It is an arithmetic number, because the mean of its divisors is an integer number (181511337).

Almost surely, 2^723575513 is an apocalyptic number.

It is an amenable number.

723575513 is a deficient number, since it is larger than the sum of its proper divisors (2469835).

723575513 is a wasteful number, since it uses less digits than its factorization.

723575513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469834.

The product of its digits is 110250, while the sum is 38.

The square root of 723575513 is about 26899.3589700573. The cubic root of 723575513 is about 897.7621409762.

The spelling of 723575513 in words is "seven hundred twenty-three million, five hundred seventy-five thousand, five hundred thirteen".