631623 has 8 divisors (see below), whose sum is σ = 847728. Its totient is φ = 418304.

The previous prime is 631619. The next prime is 631643. The reversal of 631623 is 326136.

631623 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631623 - 2² = 631619 is a prime.

It is a super-2 number, since 2×631623² = 797895228258, which contains 22 as substring.

631623 is strictly pandigital in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 631623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90 + ... + 1127.

It is an arithmetic number, because the mean of its divisors is an integer number (105966).

2⁶³¹⁶²³ is an apocalyptic number.

631623 is a deficient number, since it is larger than the sum of its proper divisors (216105).

631623 is a wasteful number, since it uses less digits than its factorization.

631623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393.

The product of its digits is 648, while the sum is 21.

The square root of 631623 is about 794.7471295953. The cubic root of 631623 is about 85.7997413612.

Adding to 631623 its reverse (326136), we get a palindrome (957759).

The spelling of 631623 in words is "six hundred thirty-one thousand, six hundred twenty-three".