4157989 has 4 divisors (see below), whose sum is σ = 4536000. Its totient is φ = 3779980.

The previous prime is 4157981. The next prime is 4158001. The reversal of 4157989 is 9897514.

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 4157989 - 2³ = 4157981 is a prime.

It is a super-3 number, since 3×4157989³ (a number of 21 digits) contains 333 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 (4157981) 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 3 ways as a sum of consecutive naturals, for example, 188989 + ... + 189010.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^4157989 is an apocalyptic number.

It is an amenable number.

4157989 is a deficient number, since it is larger than the sum of its proper divisors (378011).

4157989 is a wasteful number, since it uses less digits than its factorization.

4157989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378010.

The product of its digits is 90720, while the sum is 43.

The square root of 4157989 is about 2039.1147589089. The cubic root of 4157989 is about 160.8031105270.

The spelling of 4157989 in words is "four million, one hundred fifty-seven thousand, nine hundred eighty-nine".