4650391 has 2 divisors, whose sum is σ = 4650392. Its totient is φ = 4650390.

The previous prime is 4650389. The next prime is 4650427. The reversal of 4650391 is 1930564.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4650391 - 2¹ = 4650389 is a prime.

It is a super-2 number, since 2×4650391² = 43252272905762, which contains 22 as substring.

Together with 4650389, it forms a pair of twin primes.

4650391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4650311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2325195 + 2325196.

It is an arithmetic number, because the mean of its divisors is an integer number (2325196).

Almost surely, 2^4650391 is an apocalyptic number.

4650391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4650391 is an equidigital number, since it uses as much as digits as its factorization.

4650391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 4650391 is about 2156.4765243332. The cubic root of 4650391 is about 166.9154316224.

It can be divided in two parts, 4650 and 391, that added together give a square (5041 = 71²).

The spelling of 4650391 in words is "four million, six hundred fifty thousand, three hundred ninety-one".