450820987 has 16 divisors (see below), whose sum is σ = 476720640. Its totient is φ = 425773152.

The previous prime is 450820969. The next prime is 450820991. The reversal of 450820987 is 789028054.

It is a cyclic number.

It is not a de Polignac number, because 450820987 - 2⁷ = 450820859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450820687) 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, 283998 + ... + 285580.

It is an arithmetic number, because the mean of its divisors is an integer number (29795040).

Almost surely, 2^450820987 is an apocalyptic number.

450820987 is a deficient number, since it is larger than the sum of its proper divisors (25899653).

450820987 is a wasteful number, since it uses less digits than its factorization.

450820987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 450820987 is about 21232.5454668064. The cubic root of 450820987 is about 766.7751715573.

The spelling of 450820987 in words is "four hundred fifty million, eight hundred twenty thousand, nine hundred eighty-seven".