4389091 has 12 divisors (see below), whose sum is σ = 5155216. Its totient is φ = 3660480.

The previous prime is 4389083. The next prime is 4389131. The reversal of 4389091 is 1909834.

It is not a de Polignac number, because 4389091 - 2³ = 4389083 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 (4389031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11581 + ... + 11953.

Almost surely, 2^4389091 is an apocalyptic number.

4389091 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4389091 is a deficient number, since it is larger than the sum of its proper divisors (766125).

4389091 is an equidigital number, since it uses as much as digits as its factorization.

4389091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 4389091 is about 2095.0157517308. The cubic root of 4389091 is about 163.7287181712.

The spelling of 4389091 in words is "four million, three hundred eighty-nine thousand, ninety-one".