450038993 has 2 divisors, whose sum is σ = 450038994. Its totient is φ = 450038992.

The previous prime is 450038987. The next prime is 450039043. The reversal of 450038993 is 399830054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444872464 + 5166529 = 21092^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 450038993 - 2⁶ = 450038929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 450038993.

It is not a weakly prime, because it can be changed into another prime (450028993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225019496 + 225019497.

It is an arithmetic number, because the mean of its divisors is an integer number (225019497).

Almost surely, 2^450038993 is an apocalyptic number.

It is an amenable number.

450038993 is a deficient number, since it is larger than the sum of its proper divisors (1).

450038993 is an equidigital number, since it uses as much as digits as its factorization.

450038993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 450038993 is about 21214.1224895116. The cubic root of 450038993 is about 766.3315656089.

The spelling of 450038993 in words is "four hundred fifty million, thirty-eight thousand, nine hundred ninety-three".