723634 has 16 divisors (see below), whose sum is σ = 1159200. Its totient is φ = 337824.

The previous prime is 723623. The next prime is 723661. The reversal of 723634 is 436327.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 723599 and 723608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5137 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (72450).

2⁷²³⁶³⁴ is an apocalyptic number.

723634 is a deficient number, since it is larger than the sum of its proper divisors (435566).

723634 is a wasteful number, since it uses less digits than its factorization.

With its successor (723635) it forms an eRAP, since the sums of their prime factors are consecutive (297 and 298).

723634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its digits is 3024, while the sum is 25.

The square root of 723634 is about 850.6667972832. Note that the first 3 decimals coincide. The cubic root of 723634 is about 89.7786329191.

The spelling of 723634 in words is "seven hundred twenty-three thousand, six hundred thirty-four".