4866391 has 2 divisors, whose sum is σ = 4866392. Its totient is φ = 4866390.

The previous prime is 4866383. The next prime is 4866401. The reversal of 4866391 is 1936684.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4866391 - 2³ = 4866383 is a prime.

It is a super-2 number, since 2×4866391² = 47363522729762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4866391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4866341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2433195 + 2433196.

It is an arithmetic number, because the mean of its divisors is an integer number (2433196).

Almost surely, 2^4866391 is an apocalyptic number.

4866391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4866391 is an equidigital number, since it uses as much as digits as its factorization.

4866391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 4866391 is about 2205.9898005204. The cubic root of 4866391 is about 169.4607015805.

The spelling of 4866391 in words is "four million, eight hundred sixty-six thousand, three hundred ninety-one".