435989 has 4 divisors (see below), whose sum is σ = 438924. Its totient is φ = 433056.

The previous prime is 435983. The next prime is 435997. The reversal of 435989 is 989534.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96100 + 339889 = 310^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 435989 - 2⁴ = 435973 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 (435983) 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, 1232 + ... + 1545.

It is an arithmetic number, because the mean of its divisors is an integer number (109731).

2⁴³⁵⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

435989 is a deficient number, since it is larger than the sum of its proper divisors (2935).

435989 is a wasteful number, since it uses less digits than its factorization.

435989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934.

The product of its digits is 38880, while the sum is 38.

The square root of 435989 is about 660.2946312064. The cubic root of 435989 is about 75.8272275673.

The spelling of 435989 in words is "four hundred thirty-five thousand, nine hundred eighty-nine".