450155399 has 4 divisors (see below), whose sum is σ = 450344520. Its totient is φ = 449966280.

The previous prime is 450155389. The next prime is 450155401. The reversal of 450155399 is 993551054.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 450155399 - 2¹⁶ = 450089863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450155339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90944 + ... + 95765.

It is an arithmetic number, because the mean of its divisors is an integer number (112586130).

Almost surely, 2^450155399 is an apocalyptic number.

450155399 is a deficient number, since it is larger than the sum of its proper divisors (189121).

450155399 is a wasteful number, since it uses less digits than its factorization.

450155399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189120.

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 450155399 is about 21216.8659089885. The cubic root of 450155399 is about 766.3976324042.

The spelling of 450155399 in words is "four hundred fifty million, one hundred fifty-five thousand, three hundred ninety-nine".