724691 has 4 divisors (see below), whose sum is σ = 790584. Its totient is φ = 658800.

The previous prime is 724651. The next prime is 724721. The reversal of 724691 is 196427.

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

It is a cyclic number.

It is not a de Polignac number, because 724691 - 2⁶ = 724627 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 724691.

It is not an unprimeable number, because it can be changed into a prime (724601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32930 + ... + 32951.

It is an arithmetic number, because the mean of its divisors is an integer number (197646).

2⁷²⁴⁶⁹¹ is an apocalyptic number.

724691 is a deficient number, since it is larger than the sum of its proper divisors (65893).

724691 is a wasteful number, since it uses less digits than its factorization.

724691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65892.

The product of its digits is 3024, while the sum is 29.

The square root of 724691 is about 851.2878479104. The cubic root of 724691 is about 89.8223243654.

It can be divided in two parts, 7246 and 91, that added together give a palindrome (7337).

The spelling of 724691 in words is "seven hundred twenty-four thousand, six hundred ninety-one".