84649021 has 8 divisors (see below), whose sum is σ = 86615424. Its totient is φ = 82689600.

The previous prime is 84649013. The next prime is 84649027. The reversal of 84649021 is 12094648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84649021 - 2³ = 84649013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84649027) 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 7 ways as a sum of consecutive naturals, for example, 28821 + ... + 31621.

It is an arithmetic number, because the mean of its divisors is an integer number (10826928).

Almost surely, 2^84649021 is an apocalyptic number.

It is an amenable number.

84649021 is a deficient number, since it is larger than the sum of its proper divisors (1966403).

84649021 is a wasteful number, since it uses less digits than its factorization.

84649021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 84649021 is about 9200.4902586764. The cubic root of 84649021 is about 439.0769578814.

The spelling of 84649021 in words is "eighty-four million, six hundred forty-nine thousand, twenty-one".