84624989 has 4 divisors (see below), whose sum is σ = 86593056. Its totient is φ = 82656924.

The previous prime is 84624983. The next prime is 84625001. The reversal of 84624989 is 98942648.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84624989 - 2²⁰ = 83576413 is a prime.

It is a super-2 number, since 2×84624989² = 14322777526500242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84624983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983969 + ... + 984054.

It is an arithmetic number, because the mean of its divisors is an integer number (21648264).

Almost surely, 2^84624989 is an apocalyptic number.

It is an amenable number.

84624989 is a deficient number, since it is larger than the sum of its proper divisors (1968067).

84624989 is a wasteful number, since it uses less digits than its factorization.

84624989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968066.

The product of its digits is 995328, while the sum is 50.

The square root of 84624989 is about 9199.1841486080. The cubic root of 84624989 is about 439.0354023854.

The spelling of 84624989 in words is "eighty-four million, six hundred twenty-four thousand, nine hundred eighty-nine".