4098391 has 6 divisors (see below), whose sum is σ = 4504976. Its totient is φ = 3725700.

The previous prime is 4098389. The next prime is 4098403. The reversal of 4098391 is 1938904.

It is not a de Polignac number, because 4098391 - 2¹ = 4098389 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 (4098371) 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 5 ways as a sum of consecutive naturals, for example, 16815 + ... + 17056.

Almost surely, 2^4098391 is an apocalyptic number.

4098391 is a deficient number, since it is larger than the sum of its proper divisors (406585).

4098391 is a wasteful number, since it uses less digits than its factorization.

4098391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33893 (or 33882 counting only the distinct ones).

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

The square root of 4098391 is about 2024.4483199134. The cubic root of 4098391 is about 160.0311267566.

It can be divided in two parts, 4098 and 391, that added together give a square (4489 = 67²).

The spelling of 4098391 in words is "four million, ninety-eight thousand, three hundred ninety-one".