450391 has 2 divisors, whose sum is σ = 450392. Its totient is φ = 450390.

The previous prime is 450383. The next prime is 450403. The reversal of 450391 is 193054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 450391 - 2³ = 450383 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225195 + 225196.

It is an arithmetic number, because the mean of its divisors is an integer number (225196).

2⁴⁵⁰³⁹¹ is an apocalyptic number.

450391 is a deficient number, since it is larger than the sum of its proper divisors (1).

450391 is an equidigital number, since it uses as much as digits as its factorization.

450391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 450391 is about 671.1117641645. Note that the first 3 decimals coincide. The cubic root of 450391 is about 76.6531314060.

It can be divided in two parts, 450 and 391, that added together give a square (841 = 29²).

The spelling of 450391 in words is "four hundred fifty thousand, three hundred ninety-one".