724735481 has 4 divisors (see below), whose sum is σ = 724812432. Its totient is φ = 724658532.

The previous prime is 724735477. The next prime is 724735489. The reversal of 724735481 is 184537427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 184537427 = 59 ⋅3127753.

It is a cyclic number.

It is not a de Polignac number, because 724735481 - 2² = 724735477 is a prime.

It is a super-2 number, since 2×724735481² = 1050483034840602722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724735489) 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, 21995 + ... + 43968.

It is an arithmetic number, because the mean of its divisors is an integer number (181203108).

Almost surely, 2^724735481 is an apocalyptic number.

It is an amenable number.

724735481 is a deficient number, since it is larger than the sum of its proper divisors (76951).

724735481 is a wasteful number, since it uses less digits than its factorization.

724735481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76950.

The product of its digits is 188160, while the sum is 41.

The square root of 724735481 is about 26920.9115930349. The cubic root of 724735481 is about 898.2416207049.

The spelling of 724735481 in words is "seven hundred twenty-four million, seven hundred thirty-five thousand, four hundred eighty-one".