723646491 has 8 divisors (see below), whose sum is σ = 965020944. Its totient is φ = 482351520.

The previous prime is 723646459. The next prime is 723646499. The reversal of 723646491 is 194646327.

723646491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 723646491 - 2⁵ = 723646459 is a prime.

It is a super-2 number, since 2×723646491² = 1047328487873226162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (723646499) 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, 6301 + ... + 38561.

It is an arithmetic number, because the mean of its divisors is an integer number (120627618).

Almost surely, 2^723646491 is an apocalyptic number.

723646491 is a deficient number, since it is larger than the sum of its proper divisors (241374453).

723646491 is a wasteful number, since it uses less digits than its factorization.

723646491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39741.

The product of its digits is 217728, while the sum is 42.

The square root of 723646491 is about 26900.6782628245. The cubic root of 723646491 is about 897.7914948707.

The spelling of 723646491 in words is "seven hundred twenty-three million, six hundred forty-six thousand, four hundred ninety-one".