4905391 has 2 divisors, whose sum is σ = 4905392. Its totient is φ = 4905390.

The previous prime is 4905389. The next prime is 4905421. The reversal of 4905391 is 1935094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4905391 - 2¹ = 4905389 is a prime.

It is a super-3 number, since 3×4905391³ (a number of 21 digits) contains 333 as substring.

Together with 4905389, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4905301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2452695 + 2452696.

It is an arithmetic number, because the mean of its divisors is an integer number (2452696).

Almost surely, 2^4905391 is an apocalyptic number.

4905391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4905391 is an equidigital number, since it uses as much as digits as its factorization.

4905391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 4905391 is about 2214.8117301477. The cubic root of 4905391 is about 169.9121922546.

The spelling of 4905391 in words is "four million, nine hundred five thousand, three hundred ninety-one".