724413862921 has 4 divisors (see below), whose sum is σ = 827901557632. Its totient is φ = 620926168212.

The previous prime is 724413862883. The next prime is 724413862967. The reversal of 724413862921 is 129268314427.

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 an emirpimes, since its reverse is a distinct semiprime: 129268314427 = 7 ⋅18466902061.

It is not a de Polignac number, because 724413862921 - 2⁷ = 724413862793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724413862981) 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, 51743847345 + ... + 51743847358.

It is an arithmetic number, because the mean of its divisors is an integer number (206975389408).

Almost surely, 2^724413862921 is an apocalyptic number.

It is an amenable number.

724413862921 is a deficient number, since it is larger than the sum of its proper divisors (103487694711).

724413862921 is a wasteful number, since it uses less digits than its factorization.

724413862921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103487694710.

The product of its digits is 1161216, while the sum is 49.

The spelling of 724413862921 in words is "seven hundred twenty-four billion, four hundred thirteen million, eight hundred sixty-two thousand, nine hundred twenty-one".