4288391 has 2 divisors, whose sum is σ = 4288392. Its totient is φ = 4288390.

The previous prime is 4288321. The next prime is 4288397. The reversal of 4288391 is 1938824.

It is a happy number.

4288391 is nontrivially palindromic in base 9.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4288391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4288397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2144195 + 2144196.

It is an arithmetic number, because the mean of its divisors is an integer number (2144196).

Almost surely, 2^4288391 is an apocalyptic number.

4288391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4288391 is an equidigital number, since it uses as much as digits as its factorization.

4288391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 4288391 is about 2070.8430650341. The cubic root of 4288391 is about 162.4668618818.

The spelling of 4288391 in words is "four million, two hundred eighty-eight thousand, three hundred ninety-one".