724940243 has 4 divisors (see below), whose sum is σ = 756459408. Its totient is φ = 693421080.

The previous prime is 724940233. The next prime is 724940303. The reversal of 724940243 is 342049427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342049427 = 3023 ⋅113149.

It is a cyclic number.

It is not a de Polignac number, because 724940243 - 2¹⁰ = 724939219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724940233) 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, 15759548 + ... + 15759593.

It is an arithmetic number, because the mean of its divisors is an integer number (189114852).

Almost surely, 2^724940243 is an apocalyptic number.

724940243 is a deficient number, since it is larger than the sum of its proper divisors (31519165).

724940243 is a wasteful number, since it uses less digits than its factorization.

724940243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31519164.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 724940243 is about 26924.7143531737. The cubic root of 724940243 is about 898.3262071674.

The spelling of 724940243 in words is "seven hundred twenty-four million, nine hundred forty thousand, two hundred forty-three".