4138091 has 4 divisors (see below), whose sum is σ = 4318032. Its totient is φ = 3958152.

The previous prime is 4138073. The next prime is 4138111. The reversal of 4138091 is 1908314.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1908314 = 2 ⋅954157.

It is a cyclic number.

It is not a de Polignac number, because 4138091 - 2¹⁴ = 4121707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4138091.

It is not an unprimeable number, because it can be changed into a prime (4138051) 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, 89936 + ... + 89981.

It is an arithmetic number, because the mean of its divisors is an integer number (1079508).

Almost surely, 2^4138091 is an apocalyptic number.

4138091 is a deficient number, since it is larger than the sum of its proper divisors (179941).

4138091 is a wasteful number, since it uses less digits than its factorization.

4138091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179940.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 4138091 is about 2034.2298296899. The cubic root of 4138091 is about 160.5461932301.

The spelling of 4138091 in words is "four million, one hundred thirty-eight thousand, ninety-one".