5638723 has 4 divisors (see below), whose sum is σ = 5745168. Its totient is φ = 5532280.

The previous prime is 5638709. The next prime is 5638751. The reversal of 5638723 is 3278365.

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 5638723 - 2⁵ = 5638691 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5638753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53143 + ... + 53248.

It is an arithmetic number, because the mean of its divisors is an integer number (1436292).

Almost surely, 2^5638723 is an apocalyptic number.

5638723 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

5638723 is a deficient number, since it is larger than the sum of its proper divisors (106445).

5638723 is a wasteful number, since it uses less digits than its factorization.

5638723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106444.

The product of its digits is 30240, while the sum is 34.

The square root of 5638723 is about 2374.5995451865. The cubic root of 5638723 is about 177.9891736882.

The spelling of 5638723 in words is "five million, six hundred thirty-eight thousand, seven hundred twenty-three".