84219291 has 24 divisors (see below), whose sum is σ = 135112560. Its totient is φ = 51824448.

The previous prime is 84219287. The next prime is 84219299. The reversal of 84219291 is 19291248.

It is not a de Polignac number, because 84219291 - 2² = 84219287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84219299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4666 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (5629690).

Almost surely, 2^84219291 is an apocalyptic number.

84219291 is a deficient number, since it is larger than the sum of its proper divisors (50893269).

84219291 is a wasteful number, since it uses less digits than its factorization.

84219291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18492 (or 18473 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 84219291 is about 9177.1068970564. The cubic root of 84219291 is about 438.3326896272.

The spelling of 84219291 in words is "eighty-four million, two hundred nineteen thousand, two hundred ninety-one".