4961989 has 8 divisors (see below), whose sum is σ = 5064192. Its totient is φ = 4860960.

The previous prime is 4961969. The next prime is 4962037. The reversal of 4961989 is 9891694.

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 4961989 - 2⁹ = 4961477 is a prime.

It is a super-2 number, since 2×4961989² = 49242669672242, 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 (4961939) 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 7 ways as a sum of consecutive naturals, for example, 15697 + ... + 16009.

It is an arithmetic number, because the mean of its divisors is an integer number (633024).

Almost surely, 2^4961989 is an apocalyptic number.

It is an amenable number.

4961989 is a deficient number, since it is larger than the sum of its proper divisors (102203).

4961989 is a wasteful number, since it uses less digits than its factorization.

4961989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its digits is 139968, while the sum is 46.

The square root of 4961989 is about 2227.5522440562. The cubic root of 4961989 is about 170.5631726417.

It can be divided in two parts, 496 and 1989, that added together give a triangular number (2485 = T₇₀).

The spelling of 4961989 in words is "four million, nine hundred sixty-one thousand, nine hundred eighty-nine".