724494421 has 8 divisors (see below), whose sum is σ = 828177984. Its totient is φ = 620856960.

The previous prime is 724494409. The next prime is 724494427. The reversal of 724494421 is 124494427.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 724494421 - 2⁷ = 724494293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724494427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34326 + ... + 51256.

It is an arithmetic number, because the mean of its divisors is an integer number (103522248).

Almost surely, 2^724494421 is an apocalyptic number.

It is an amenable number.

724494421 is a deficient number, since it is larger than the sum of its proper divisors (103683563).

724494421 is a wasteful number, since it uses less digits than its factorization.

724494421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23051.

The product of its digits is 64512, while the sum is 37.

The square root of 724494421 is about 26916.4340320184. The cubic root of 724494421 is about 898.1420192445.

The spelling of 724494421 in words is "seven hundred twenty-four million, four hundred ninety-four thousand, four hundred twenty-one".