4891623 has 16 divisors (see below), whose sum is σ = 7157376. Its totient is φ = 2947040.

The previous prime is 4891591. The next prime is 4891639. The reversal of 4891623 is 3261984.

It is a cyclic number.

It is not a de Polignac number, because 4891623 - 2⁵ = 4891591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7165 + ... + 7817.

It is an arithmetic number, because the mean of its divisors is an integer number (447336).

Almost surely, 2^4891623 is an apocalyptic number.

4891623 is a deficient number, since it is larger than the sum of its proper divisors (2265753).

4891623 is a wasteful number, since it uses less digits than its factorization.

4891623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894.

The product of its digits is 10368, while the sum is 33.

The square root of 4891623 is about 2211.7013812900. The cubic root of 4891623 is about 169.7530786653.

It can be divided in two parts, 489 and 1623, that added together give a palindrome (2112).

The spelling of 4891623 in words is "four million, eight hundred ninety-one thousand, six hundred twenty-three".