84258909 has 12 divisors (see below), whose sum is σ = 139094176. Its totient is φ = 48147912.

The previous prime is 84258907. The next prime is 84258929. The reversal of 84258909 is 90985248.

It is not a de Polignac number, because 84258909 - 2¹ = 84258907 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84258907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 668659 + ... + 668784.

Almost surely, 2^84258909 is an apocalyptic number.

It is an amenable number.

84258909 is a deficient number, since it is larger than the sum of its proper divisors (54835267).

84258909 is a wasteful number, since it uses less digits than its factorization.

84258909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337456 (or 1337453 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 84258909 is about 9179.2651666678. The cubic root of 84258909 is about 438.4014115789.

The spelling of 84258909 in words is "eighty-four million, two hundred fifty-eight thousand, nine hundred nine".