4931989 has 8 divisors (see below), whose sum is σ = 5363928. Its totient is φ = 4515840.

The previous prime is 4931957. The next prime is 4931999. The reversal of 4931989 is 9891394.

It can be written as a sum of positive squares in 4 ways, for example, as 2007889 + 2924100 = 1417^2 + 1710^2 .

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 4931989 - 2⁵ = 4931957 is a prime.

It is a super-2 number, since 2×4931989² = 48649030992242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4931909) 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, 3292 + ... + 4549.

It is an arithmetic number, because the mean of its divisors is an integer number (670491).

Almost surely, 2^4931989 is an apocalyptic number.

It is an amenable number.

4931989 is a deficient number, since it is larger than the sum of its proper divisors (431939).

4931989 is a wasteful number, since it uses less digits than its factorization.

4931989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895.

The product of its digits is 69984, while the sum is 43.

The square root of 4931989 is about 2220.8081862241. The cubic root of 4931989 is about 170.2187380381.

The spelling of 4931989 in words is "four million, nine hundred thirty-one thousand, nine hundred eighty-nine".