84409641 has 32 divisors (see below), whose sum is σ = 133297920. Its totient is φ = 52607232.

The previous prime is 84409627. The next prime is 84409651. The reversal of 84409641 is 14690448.

It is a happy number.

84409641 is a `hidden beast` number, since 8 + 4 + 4 + 0 + 9 + 641 = 666.

It is not a de Polignac number, because 84409641 - 2¹⁰ = 84408617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84409596 and 84409605.

It is not an unprimeable number, because it can be changed into a prime (84409651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78876 + ... + 79938.

It is an arithmetic number, because the mean of its divisors is an integer number (4165560).

Almost surely, 2^84409641 is an apocalyptic number.

It is an amenable number.

84409641 is a deficient number, since it is larger than the sum of its proper divisors (48888279).

84409641 is a wasteful number, since it uses less digits than its factorization.

84409641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 84409641 is about 9187.4719591409. The cubic root of 84409641 is about 438.6626767554.

It can be divided in two parts, 8440 and 9641, that added together give a palindrome (18081).

The spelling of 84409641 in words is "eighty-four million, four hundred nine thousand, six hundred forty-one".