450887681 has 8 divisors (see below), whose sum is σ = 457670400. Its totient is φ = 444132000.

The previous prime is 450887659. The next prime is 450887693. The reversal of 450887681 is 186788054.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 450887681 - 2²⁶ = 383778817 is a prime.

It is a super-2 number, since 2×450887681² = 406599401755115522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (450887611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28181 + ... + 41181.

It is an arithmetic number, because the mean of its divisors is an integer number (57208800).

It is a Proth number, since it is equal to 215 ⋅ 2²¹ + 1 and 215 < 2²¹.

Almost surely, 2^450887681 is an apocalyptic number.

It is an amenable number.

450887681 is a deficient number, since it is larger than the sum of its proper divisors (6782719).

450887681 is a wasteful number, since it uses less digits than its factorization.

450887681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519.

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 450887681 is about 21234.1159693546. The cubic root of 450887681 is about 766.8129816735.

The spelling of 450887681 in words is "four hundred fifty million, eight hundred eighty-seven thousand, six hundred eighty-one".