4078091 has 4 divisors (see below), whose sum is σ = 4116312. Its totient is φ = 4039872.

The previous prime is 4078073. The next prime is 4078099. The reversal of 4078091 is 1908704.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4078091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4078099) 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, 18950 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (1029078).

Almost surely, 2^4078091 is an apocalyptic number.

4078091 is a deficient number, since it is larger than the sum of its proper divisors (38221).

4078091 is a wasteful number, since it uses less digits than its factorization.

4078091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38220.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 4078091 is about 2019.4283844692. The cubic root of 4078091 is about 159.7664692077.

The spelling of 4078091 in words is "four million, seventy-eight thousand, ninety-one".