401723 has 4 divisors (see below), whose sum is σ = 459120. Its totient is φ = 344328.

The previous prime is 401711. The next prime is 401743. The reversal of 401723 is 327104.

It is a happy number.

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 401723 - 2⁴ = 401707 is a prime.

It is a super-2 number, since 2×401723² = 322762737458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401743) 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, 28688 + ... + 28701.

It is an arithmetic number, because the mean of its divisors is an integer number (114780).

2⁴⁰¹⁷²³ is an apocalyptic number.

401723 is a deficient number, since it is larger than the sum of its proper divisors (57397).

401723 is an equidigital number, since it uses as much as digits as its factorization.

401723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57396.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 401723 is about 633.8162194201. The cubic root of 401723 is about 73.7862715385.

Adding to 401723 its reverse (327104), we get a palindrome (728827).

The spelling of 401723 in words is "four hundred one thousand, seven hundred twenty-three", and thus it is an iban number.