84161894 has 4 divisors (see below), whose sum is σ = 126242844. Its totient is φ = 42080946.

The previous prime is 84161893. The next prime is 84161897. The reversal of 84161894 is 49816148.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84161893) 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 as a sum of consecutive naturals, namely, 21040472 + ... + 21040475.

It is an arithmetic number, because the mean of its divisors is an integer number (31560711).

Almost surely, 2^84161894 is an apocalyptic number.

84161894 is a deficient number, since it is larger than the sum of its proper divisors (42080950).

84161894 is a wasteful number, since it uses less digits than its factorization.

84161894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42080949.

The product of its digits is 55296, while the sum is 41.

The square root of 84161894 is about 9173.9791802685. The cubic root of 84161894 is about 438.2330897268.

The spelling of 84161894 in words is "eighty-four million, one hundred sixty-one thousand, eight hundred ninety-four".