724909873 has 2 divisors, whose sum is σ = 724909874. Its totient is φ = 724909872.

The previous prime is 724909849. The next prime is 724909949. The reversal of 724909873 is 378909427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644753664 + 80156209 = 25392^2 + 8953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-724909873 is a prime.

It is a super-2 number, since 2×724909873² = 1050988647945752258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (724909373) 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 as a sum of consecutive naturals, namely, 362454936 + 362454937.

It is an arithmetic number, because the mean of its divisors is an integer number (362454937).

Almost surely, 2^724909873 is an apocalyptic number.

It is an amenable number.

724909873 is a deficient number, since it is larger than the sum of its proper divisors (1).

724909873 is an equidigital number, since it uses as much as digits as its factorization.

724909873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 724909873 is about 26924.1503672818. The cubic root of 724909873 is about 898.3136624332.

The spelling of 724909873 in words is "seven hundred twenty-four million, nine hundred nine thousand, eight hundred seventy-three".