450591999 has 16 divisors (see below), whose sum is σ = 705823104. Its totient is φ = 252079200.

The previous prime is 450591979. The next prime is 450592001. The reversal of 450591999 is 999195054.

It is a happy number.

It is not a de Polignac number, because 450591999 - 2¹⁶ = 450526463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450591929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524737 + ... + 525594.

It is an arithmetic number, because the mean of its divisors is an integer number (44113944).

Almost surely, 2^450591999 is an apocalyptic number.

450591999 is a deficient number, since it is larger than the sum of its proper divisors (255231105).

450591999 is a wasteful number, since it uses less digits than its factorization.

450591999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050358.

The product of its (nonzero) digits is 656100, while the sum is 51.

The square root of 450591999 is about 21227.1523996979. The cubic root of 450591999 is about 766.6453254509.

The spelling of 450591999 in words is "four hundred fifty million, five hundred ninety-one thousand, nine hundred ninety-nine".