4891789 has 4 divisors (see below), whose sum is σ = 5590624. Its totient is φ = 4192956.

The previous prime is 4891787. The next prime is 4891823. The reversal of 4891789 is 9871984.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4891789 - 2¹ = 4891787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891781) 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, 349407 + ... + 349420.

It is an arithmetic number, because the mean of its divisors is an integer number (1397656).

Almost surely, 2^4891789 is an apocalyptic number.

It is an amenable number.

4891789 is a deficient number, since it is larger than the sum of its proper divisors (698835).

4891789 is an equidigital number, since it uses as much as digits as its factorization.

4891789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698834.

The product of its digits is 145152, while the sum is 46.

The square root of 4891789 is about 2211.7389086418. The cubic root of 4891789 is about 169.7549988659.

It can be divided in two parts, 489 and 1789, that added together give a triangular number (2278 = T₆₇).

The spelling of 4891789 in words is "four million, eight hundred ninety-one thousand, seven hundred eighty-nine".