84623643 has 16 divisors (see below), whose sum is σ = 135012640. Its totient is φ = 52075872.

The previous prime is 84623639. The next prime is 84623719. The reversal of 84623643 is 34632648.

It is a happy number.

84623643 is a `hidden beast` number, since 8 + 4 + 6 + 2 + 3 + 643 = 666.

It is not a de Polignac number, because 84623643 - 2² = 84623639 is a prime.

It is a super-2 number, since 2×84623643² = 14322321909182898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84623598 and 84623607.

It is not an unprimeable number, because it can be changed into a prime (84623633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120196 + ... + 120897.

It is an arithmetic number, because the mean of its divisors is an integer number (8438290).

Almost surely, 2^84623643 is an apocalyptic number.

84623643 is a deficient number, since it is larger than the sum of its proper divisors (50388997).

84623643 is a wasteful number, since it uses less digits than its factorization.

84623643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241115 (or 241109 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 84623643 is about 9199.1109896555. The cubic root of 84623643 is about 439.0330746853.

The spelling of 84623643 in words is "eighty-four million, six hundred twenty-three thousand, six hundred forty-three".