4000291 has 2 divisors, whose sum is σ = 4000292. Its totient is φ = 4000290.

The previous prime is 4000277. The next prime is 4000301. The reversal of 4000291 is 1920004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000291 - 2¹³ = 3992099 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000145 + 2000146.

It is an arithmetic number, because the mean of its divisors is an integer number (2000146).

Almost surely, 2^4000291 is an apocalyptic number.

4000291 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000291 is an equidigital number, since it uses as much as digits as its factorization.

4000291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 4000291 is about 2000.0727486769. The cubic root of 4000291 is about 158.7439545510.

Adding to 4000291 its reverse (1920004), we get a palindrome (5920295).

The spelling of 4000291 in words is "four million, two hundred ninety-one", and thus it is an aban number.