445987 has 4 divisors (see below), whose sum is σ = 469480. Its totient is φ = 422496.

The previous prime is 445969. The next prime is 446003. The reversal of 445987 is 789544.

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 445987 - 2¹¹ = 443939 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (445937) 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, 11718 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (117370).

2⁴⁴⁵⁹⁸⁷ is an apocalyptic number.

445987 is a deficient number, since it is larger than the sum of its proper divisors (23493).

445987 is a wasteful number, since it uses less digits than its factorization.

445987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23492.

The product of its digits is 40320, while the sum is 37.

The square root of 445987 is about 667.8225812295. The cubic root of 445987 is about 76.4024701558.

The spelling of 445987 in words is "four hundred forty-five thousand, nine hundred eighty-seven".