4791989 has 8 divisors (see below), whose sum is σ = 4995000. Its totient is φ = 4591552.

The previous prime is 4791973. The next prime is 4792001. The reversal of 4791989 is 9891974.

It can be written as a sum of positive squares in 4 ways, for example, as 96100 + 4695889 = 310^2 + 2167^2 .

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 4791989 - 2⁴ = 4791973 is a prime.

It is a super-2 number, since 2×4791989² = 45926317152242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4791929) 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, 3767 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (624375).

Almost surely, 2^4791989 is an apocalyptic number.

It is an amenable number.

4791989 is a deficient number, since it is larger than the sum of its proper divisors (203011).

4791989 is a wasteful number, since it uses less digits than its factorization.

4791989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287.

The product of its digits is 163296, while the sum is 47.

The square root of 4791989 is about 2189.0612143108. The cubic root of 4791989 is about 168.5926372065.

The spelling of 4791989 in words is "four million, seven hundred ninety-one thousand, nine hundred eighty-nine".