724304991 has 4 divisors (see below), whose sum is σ = 965739992. Its totient is φ = 482869992.

The previous prime is 724304989. The next prime is 724305013. The reversal of 724304991 is 199403427.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 724304991 - 2¹ = 724304989 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 (724304291) 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, 120717496 + ... + 120717501.

It is an arithmetic number, because the mean of its divisors is an integer number (241434998).

Almost surely, 2^724304991 is an apocalyptic number.

724304991 is a deficient number, since it is larger than the sum of its proper divisors (241435001).

724304991 is a wasteful number, since it uses less digits than its factorization.

724304991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241435000.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 724304991 is about 26912.9149480319. The cubic root of 724304991 is about 898.0637348262.

It can be divided in two parts, 72430 and 4991, that added together give a triangular number (77421 = T₃₉₃).

The spelling of 724304991 in words is "seven hundred twenty-four million, three hundred four thousand, nine hundred ninety-one".