84219657 has 8 divisors (see below), whose sum is σ = 112423584. Its totient is φ = 56081088.

The previous prime is 84219637. The next prime is 84219661. The reversal of 84219657 is 75691248.

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

It is not a de Polignac number, because 84219657 - 2¹⁸ = 83957513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84219637) 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, 13248 + ... + 18545.

It is an arithmetic number, because the mean of its divisors is an integer number (14052948).

Almost surely, 2^84219657 is an apocalyptic number.

It is an amenable number.

84219657 is a deficient number, since it is larger than the sum of its proper divisors (28203927).

84219657 is a wasteful number, since it uses less digits than its factorization.

84219657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32679.

The product of its digits is 120960, while the sum is 42.

The square root of 84219657 is about 9177.1268379597. The cubic root of 84219657 is about 438.3333245947. Note that the first 4 decimals are identical.

The spelling of 84219657 in words is "eighty-four million, two hundred nineteen thousand, six hundred fifty-seven".