724212491 has 4 divisors (see below), whose sum is σ = 732349800. Its totient is φ = 716075184.

The previous prime is 724212481. The next prime is 724212497. The reversal of 724212491 is 194212427.

It is a happy number.

724212491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194212427 = 31 ⋅6264917.

It is a cyclic number.

It is not a de Polignac number, because 724212491 - 2²⁶ = 657103627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724212497) 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, 4068521 + ... + 4068698.

It is an arithmetic number, because the mean of its divisors is an integer number (183087450).

Almost surely, 2^724212491 is an apocalyptic number.

724212491 is a deficient number, since it is larger than the sum of its proper divisors (8137309).

724212491 is an equidigital number, since it uses as much as digits as its factorization.

724212491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8137308.

The product of its digits is 8064, while the sum is 32.

The square root of 724212491 is about 26911.1963873775. The cubic root of 724212491 is about 898.0255030348.

The spelling of 724212491 in words is "seven hundred twenty-four million, two hundred twelve thousand, four hundred ninety-one".