4620391 has 2 divisors, whose sum is σ = 4620392. Its totient is φ = 4620390.

The previous prime is 4620377. The next prime is 4620397. The reversal of 4620391 is 1930264.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4620391 - 2⁵ = 4620359 is a prime.

It is an Ulam number.

4620391 is a lucky number.

It is equal to p₃₂₃₇₈₂ and since 4620391 and 323782 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4620397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2310195 + 2310196.

It is an arithmetic number, because the mean of its divisors is an integer number (2310196).

Almost surely, 2^4620391 is an apocalyptic number.

4620391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4620391 is an equidigital number, since it uses as much as digits as its factorization.

4620391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4620391 is about 2149.5094789277. The cubic root of 4620391 is about 166.5557292849. Note that the first 3 decimals are identical.

The spelling of 4620391 in words is "four million, six hundred twenty thousand, three hundred ninety-one".