450805691 has 4 divisors (see below), whose sum is σ = 515206512. Its totient is φ = 386404872.

The previous prime is 450805687. The next prime is 450805721. The reversal of 450805691 is 196508054.

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

It is not a de Polignac number, because 450805691 - 2² = 450805687 is a prime.

It is a Duffinian number.

450805691 is a modest number, since divided by 5691 gives 4508 as remainder.

It is not an unprimeable number, because it can be changed into a prime (450805631) 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, 32200400 + ... + 32200413.

It is an arithmetic number, because the mean of its divisors is an integer number (128801628).

Almost surely, 2^450805691 is an apocalyptic number.

450805691 is a deficient number, since it is larger than the sum of its proper divisors (64400821).

450805691 is an equidigital number, since it uses as much as digits as its factorization.

450805691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64400820.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 450805691 is about 21232.1852620026. The cubic root of 450805691 is about 766.7664994339.

The spelling of 450805691 in words is "four hundred fifty million, eight hundred five thousand, six hundred ninety-one".