4001623 has 8 divisors (see below), whose sum is σ = 4237200. Its totient is φ = 3772608.

The previous prime is 4001617. The next prime is 4001629. The reversal of 4001623 is 3261004.

It is an interprime number because it is at equal distance from previous prime (4001617) and next prime (4001629).

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 4001623 - 2⁹ = 4001111 is a prime.

It is a Duffinian number.

4001623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4001597 and 4001606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001629) 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, 358 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (529650).

Almost surely, 2^4001623 is an apocalyptic number.

4001623 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

4001623 is a deficient number, since it is larger than the sum of its proper divisors (235577).

4001623 is a wasteful number, since it uses less digits than its factorization.

4001623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281.

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

The square root of 4001623 is about 2000.4057088501. The cubic root of 4001623 is about 158.7615718929.

Adding to 4001623 its reverse (3261004), we get a palindrome (7262627).

It can be divided in two parts, 4001 and 623, that added together give a square (4624 = 68²).

The spelling of 4001623 in words is "four million, one thousand, six hundred twenty-three".