4637989 has 4 divisors (see below), whose sum is σ = 4646124. Its totient is φ = 4629856.

The previous prime is 4637981. The next prime is 4638001. The reversal of 4637989 is 9897364.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2125764 + 2512225 = 1458^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 4637989 - 2³ = 4637981 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 (4637981) 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, 3142 + ... + 4375.

It is an arithmetic number, because the mean of its divisors is an integer number (1161531).

Almost surely, 2^4637989 is an apocalyptic number.

It is an amenable number.

4637989 is a deficient number, since it is larger than the sum of its proper divisors (8135).

4637989 is an equidigital number, since it uses as much as digits as its factorization.

4637989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134.

The product of its digits is 326592, while the sum is 46.

The square root of 4637989 is about 2153.5990806090. The cubic root of 4637989 is about 166.7669187961.

The spelling of 4637989 in words is "four million, six hundred thirty-seven thousand, nine hundred eighty-nine".