84204917 has 4 divisors (see below), whose sum is σ = 84225120. Its totient is φ = 84184716.

The previous prime is 84204853. The next prime is 84204919. The reversal of 84204917 is 71940248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84204917 - 2⁶ = 84204853 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 (84204919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283 + ... + 13040.

It is an arithmetic number, because the mean of its divisors is an integer number (21056280).

Almost surely, 2^84204917 is an apocalyptic number.

It is an amenable number.

84204917 is a deficient number, since it is larger than the sum of its proper divisors (20203).

84204917 is a wasteful number, since it uses less digits than its factorization.

84204917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20202.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 84204917 is about 9176.3237192244. The cubic root of 84204917 is about 438.3077509523.

The spelling of 84204917 in words is "eighty-four million, two hundred four thousand, nine hundred seventeen".