4187489 has 2 divisors, whose sum is σ = 4187490. Its totient is φ = 4187488.

The previous prime is 4187483. The next prime is 4187501. The reversal of 4187489 is 9847814.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 187489 = 2000^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 4187489 - 2⁸ = 4187233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4187483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2093744 + 2093745.

It is an arithmetic number, because the mean of its divisors is an integer number (2093745).

Almost surely, 2^4187489 is an apocalyptic number.

It is an amenable number.

4187489 is a deficient number, since it is larger than the sum of its proper divisors (1).

4187489 is an equidigital number, since it uses as much as digits as its factorization.

4187489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 4187489 is about 2046.3355052386. The cubic root of 4187489 is about 161.1825020465.

It can be divided in two parts, 4 and 187489, that multiplied together give a square (749956 = 866²).

The spelling of 4187489 in words is "four million, one hundred eighty-seven thousand, four hundred eighty-nine".