4131989 has 4 divisors (see below), whose sum is σ = 4181856. Its totient is φ = 4082124.

The previous prime is 4131983. The next prime is 4132001. The reversal of 4131989 is 9891314.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4131989 - 2¹⁶ = 4066453 is a prime.

It is a super-2 number, since 2×4131989² = 34146666192242, which contains 22 as substring.

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 (4131983) 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, 24809 + ... + 24974.

It is an arithmetic number, because the mean of its divisors is an integer number (1045464).

Almost surely, 2^4131989 is an apocalyptic number.

It is an amenable number.

4131989 is a deficient number, since it is larger than the sum of its proper divisors (49867).

4131989 is an equidigital number, since it uses as much as digits as its factorization.

4131989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49866.

The product of its digits is 7776, while the sum is 35.

The square root of 4131989 is about 2032.7294458437. The cubic root of 4131989 is about 160.4672409793.

The spelling of 4131989 in words is "four million, one hundred thirty-one thousand, nine hundred eighty-nine".