723655 has 4 divisors (see below), whose sum is σ = 868392. Its totient is φ = 578920.

The previous prime is 723623. The next prime is 723661. The reversal of 723655 is 556327.

723655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 723655 - 2⁵ = 723623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72361 + ... + 72370.

It is an arithmetic number, because the mean of its divisors is an integer number (217098).

2⁷²³⁶⁵⁵ is an apocalyptic number.

723655 is a deficient number, since it is larger than the sum of its proper divisors (144737).

723655 is a wasteful number, since it uses less digits than its factorization.

723655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144736.

The product of its digits is 6300, while the sum is 28.

The square root of 723655 is about 850.6791404519. The cubic root of 723655 is about 89.7795013752.

It can be divided in two parts, 723 and 655, that added together give a triangular number (1378 = T₅₂).

The spelling of 723655 in words is "seven hundred twenty-three thousand, six hundred fifty-five".