8434989 has 8 divisors (see below), whose sum is σ = 12496320. Its totient is φ = 5623308.

The previous prime is 8434967. The next prime is 8434991. The reversal of 8434989 is 9894348.

It is a happy number.

It is not a de Polignac number, because 8434989 - 2⁵ = 8434957 is a prime.

It is a super-2 number, since 2×8434989² = 142298078860242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8434999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156177 + ... + 156230.

It is an arithmetic number, because the mean of its divisors is an integer number (1562040).

Almost surely, 2^8434989 is an apocalyptic number.

It is an amenable number.

8434989 is a deficient number, since it is larger than the sum of its proper divisors (4061331).

8434989 is a wasteful number, since it uses less digits than its factorization.

8434989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312416 (or 312410 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 8434989 is about 2904.3052525518. The cubic root of 8434989 is about 203.5611239738.

It can be divided in two parts, 843 and 4989, that added together give a cube (5832 = 18³).

The spelling of 8434989 in words is "eight million, four hundred thirty-four thousand, nine hundred eighty-nine".