401623 has 4 divisors (see below), whose sum is σ = 403648. Its totient is φ = 399600.

The previous prime is 401593. The next prime is 401627. The reversal of 401623 is 326104.

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 401623 - 2¹⁷ = 270551 is a prime.

It is a super-4 number, since 4×401623⁴ (a number of 24 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401597 and 401606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401627) 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, 678 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (100912).

2⁴⁰¹⁶²³ is an apocalyptic number.

401623 is a deficient number, since it is larger than the sum of its proper divisors (2025).

401623 is a wasteful number, since it uses less digits than its factorization.

401623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 401623 is about 633.7373272895. The cubic root of 401623 is about 73.7801485471.

Adding to 401623 its reverse (326104), we get a palindrome (727727).

It can be divided in two parts, 401 and 623, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 401623 in words is "four hundred one thousand, six hundred twenty-three".