723649679 has 8 divisors (see below), whose sum is σ = 735467040. Its totient is φ = 711877600.

The previous prime is 723649669. The next prime is 723649681. The reversal of 723649679 is 976946327.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723649679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723649679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723649639) 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, 21677 + ... + 43785.

It is an arithmetic number, because the mean of its divisors is an integer number (91933380).

Almost surely, 2^723649679 is an apocalyptic number.

723649679 is a deficient number, since it is larger than the sum of its proper divisors (11817361).

723649679 is a wasteful number, since it uses less digits than its factorization.

723649679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22641.

The product of its digits is 3429216, while the sum is 53.

The square root of 723649679 is about 26900.7375177708. The cubic root of 723649679 is about 897.7928132654.

The spelling of 723649679 in words is "seven hundred twenty-three million, six hundred forty-nine thousand, six hundred seventy-nine".